"The phrase "in seventh heaven" means to experience great joy or contentment. The expression also implies that there are seven heavens to be had, which is a common teaching among several religions.
Two of the oldest religions that teach seven heavens are Hinduism and the ancient Babylonian cult. In Hinduism, there are seven higher worlds and seven lower worlds; the earth is the lowest higher world."
https://www.gotquestions.org/seven-heavens-seventh-heaven.html
"Seven heavens is a part of religious cosmology found in many major religions such as Islam, Judaism, Hinduism and Catholicism and in some minor religions as well. We see it mentioned for the first time in the Oral Torah."
https://hebrew.jerusalemprayerteam.org/in-seventh-heaven/
"There are 7 samawat or heavens and they are mentioned in the Quran.
(37:6) The lowest heaven (semaadunya) or the visible (shahid) heaven which contains the earth, the planets, the stars, etc.; in other words the visible universe."
"Now, when his offspring Sabaoth saw the strength of that angel, he repented and condemned his father and his mother matter.
“He loathed her, but he sang songs of praise up to Sophia and her daughter Zoe. And Sophia and Zoe found him and put him in charge of the seventh heaven, below the veil between above and below. And he is called ‘god of the forces, Sabaoth,’ since he is up above the forces of chaos, for Sophia placed him there."
http://www.gnosis.org/naghamm/Hypostas-Barnstone.html