"In Kabbalah, Ein Sof (literally, “without end”) is the term used to describe God prior to creation"
https://encyclopedia.summitlighthouse.org//index.php/Ein_Sof
"In Kabbalah there is the God of the scriptures and the mystic Ein Sof."
https://antonisch.com/2020/09/17/art-and-creation-ein-sof-kabbalah/
"Furthermore, “Ein Sof”—the dualistic and ultimately unknowable deity of Kabbalah—bears little resemblance to the God of the Bible"
https://www.equip.org/bible_answers/is-kabbalah-consistent-with-christianity/
"Kabbalists believed that there is a gap between how mankind can understand God and what God actually is. This unknowable aspect of God is called Ein-Sof.
Kabbalists believed that God is impossible to comprehend."
https://www.deliriumsrealm.com/kabbalah-ein-sof-sefirot/
"In this unique mystic science, God is often referred to as Ein Sof, also known as the Infinite. Kabbalistic belief holds that humans can never fully comprehend God because of His transcendence and infinite presence. This infinite presence is so strong, the Ein Sof is believed to be unable to have any kind of interaction with the human form."
https://thesagedivine.com/kabbalah-numerology/
"Know that before the emanations were emanated and the creations were created, there was a supernal, simple light filling all of existence. There was no vacant space . . . rather, all was filled with that simple, endless light. There was no beginning and no end; rather, all was one simple light, with a single equivalence. This is what is called the Ohr Ein Sof (Infinite Light)."
https://www.chabad.org/library/article_cdo/aid/2123175/jewish/Infinite-Light.htm
"Ein Sof, or Ayn Sof (/eɪn sɒf/, Hebrew: אין סוף), in Kabbalah, is understood as God prior to his self-manifestation in the production of any spiritual realm, probably derived from Ibn Gabirol's term, "the Endless One" (she-en lo tiklah). Ein Sof may be translated as "no end", "unending", "there is no end", or infinity."
https://infogalactic.com/info/Ein_Sof
"Rabbi Joseph Gikatilla, among the most prominent members of that circle, is recorded as saying “he fills everything and He is everything.” Moshe de Leon wrote that his essence is “above and below, in heaven and on earth, and there is no existence beside him.” And Rabbi Azriel of Gerona (1160-1238), arguably one of the founders of Kabbalah as we know it, presented one of the first clear expositions of nonduality in the Jewish context:
“If someone asks you ‘What is God,’ answer: He who is in no way deficient. If he asks you: ‘Does anything exist outside of Him?’ answer: nothing exists outside of Him."
https://www.embodiedphilosophy.com/vedanta-and-kabbalah-nonduality-east-and-west/
"And I asked to know it, and he said to me, "The Monad is a monarchy with nothing above it. It is he who exists as God and Father of everything, the invisible One who is above everything, who exists as incorruption, which is in the pure light into which no eye can look.
"He is the invisible Spirit, of whom it is not right to think of him as a god, or something similar. For he is more than a god, since there is nothing above him, for no one lords it over him. For he does not exist in something inferior to him, since everything exists in him. For it is he who establishes himself. He is eternal, since he does not need anything. For he is total perfection. He did not lack anything, that he might be completed by it; rather he is always completely perfect in light. He is illimitable, since there is no one prior to him to set limits to him. He is unsearchable, since there exists no one prior to him to examine him. He is immeasurable, since there was no one prior to him to measure him. He is invisible, since no one saw him. He is eternal, since he exists eternally. He is ineffable, since no one was able to comprehend him to speak about him. He is unnameable, since there is no one prior to him to give him a name.
"He is immeasurable light, which is pure, holy (and) immaculate. He is ineffable, being perfect in incorruptibility. (He is) not in perfection, nor in blessedness, nor in divinity, but he is far superior. He is not corporeal nor is he incorporeal. He is neither large nor is he small. There is no way to say, 'What is his quantity?' or, 'What is his quality?', for no one can know him. He is not someone among (other) beings, rather he is far superior. Not that he is (simply) superior, but his essence does not partake in the aeons nor in time. For he who partakes in an aeon was prepared beforehand. Time was not apportioned to him, since he does not receive anything from another, for it would be received on loan. For he who precedes someone does not lack, that he may receive from him. For rather, it is the latter that looks expectantly at him in his light.
"For the perfection is majestic. He is pure, immeasurable mind. He is an aeon-giving aeon. He is life-giving life. He is a blessedness-giving blessed one. He is knowledge-giving knowledge. He is goodness-giving goodness. He is mercy and redemption-giving mercy. He is grace-giving grace, not because he possesses it, but because he gives the immeasurable, incomprehensible light.
"How am I to speak with you about him? His aeon is indestructible, at rest and existing in silence, reposing (and) being prior to everything. For he is the head of all the aeons, and it is he who gives them strength in his goodness. For we know not the ineffable things, and we do not understand what is immeasurable, except for him who came forth from him, namely (from) the Father. For it is he who told it to us alone. For it is he who looks at himself in his light which surrounds him, namely the spring of the water of life. And it is he who gives to all the aeons and in every way, (and) who gazes upon his image which he sees in the spring of the Spirit. It is he who puts his desire in his water-light which is in the spring of the pure light-water which surrounds him"
""And he looked at Barbelo with the pure light which surrounds the invisible Spirit, and (with) his spark, and she conceived from him. He begot a spark of light with a light resembling blessedness. But it does not equal his greatness. This was an only-begotten child of the Mother-Father which had come forth; it is the only offspring, the only-begotten one of the Father, the pure Light"
http://www.gnosis.org/naghamm/apocjn.html
"19Then said they unto him, Where is thy Father? Jesus answered, Ye neither know me, nor my Father: if ye had known me, ye should have known my Father also."
https://biblehub.com/kjv/john/8.htm
"O righteous Father, the world hath not known thee: but I have known thee, and these have known that thou hast sent me. 26And I have declared unto them thy name, and will declare it: that the love wherewith thou hast loved me may be in them, and I in them"
https://biblehub.com/kjv/john/17.htm
"42Jesus said unto them, If God were your Father, ye would love me: for I proceeded forth and came from God; neither came I of myself, but he sent me."
https://biblehub.com/kjv/john/8.htm
"In the Kabbalistic traditions of the Jewish mystics and for many non-mystics, today’s word Ein Sof (אין סוף) holds the most important place. It is the mystery of mysteries –it, as St. Paul puts it, is the “Unknown God” (Acts 17:23)."
https://ocdlexicon.com/2015/08/04/ein-sof/