"The tongue is not boned", that is a familiar phrase in our every ears. The phrase shows how the tongue can be moved in any direction with ease. It can be straightened, bent up, down, right or left. The tongue can be folded horizontally or vertically. That's the tongue.
The tongue is one of the body's tools that is vital to man, as well as one of the body devices that can also plunge a man in the wrath and doom of Allah swt is very poignant. Therefore we must be able to control the motion of the tongue well.
To control the tongue so as not to speak in munkar, Islam has given clear rules which then called speaking. According to the eyes of Islam, there are some points which if realized insha Allah will control the tongue to always speak in goodness and avoid the speech or speech that smells of immoral, as the word of Allah swt which means, "O you who believe to pious you to Allah and say true words. "(Surah Al Ahzab: 70).