The language, which is the masterpiece of divine creation, has
been repeated many times in the Holy Quran, and the creation
of language and its God-givenness, the field related to speech,
with emphasis on the tongue and lips, has been clearly and
clearly mentioned. For this reason, in the science of linguistics,
it has assigned various principles and branches. From the
perspective of the Holy Qur'an, language is a tool for
conversation and understanding, which has an epistemological
aspect; Because the ways of understanding from the
perspective of the Holy Quran are through the eyes, ears or
tongue. If the language is used to unite the Muslim community
and spread good among them; It is the best means; Because
with the help of it, the good is done and the evil is forbidden,
and if it is used to create division among the Islamic Ummah;
It is the worst tool for the health of the individual and society
because it brings the most dangerous pests for the health of
societies and individuals in families. The most important
functions of speaking the truth of the tongue are: monotheism,
tahimidi, supplication, supplication, testimony, confirmation,
correction, guidance, training, persuasion, eloquence,
explanation, teaching, praise, and forgiveness. The method of
this research is descriptive-analytical with library technique.