The word(s) "tongue" appears 25 time(s) in 23 verse(s) in Quran in Mohsin Khan translation.

(1) And verily, among them is a party who distort the Book with their tongues (as they read), so that you may think it is from the Book, but it is not from the Book, and they say: "This is from Allah," but it is not from Allah; and they speak a lie against Allah while they know it.

(2) Verily, those who disbelieved after their Belief and then went on increasing in their disbelief (i.e. disbelief in the Qur'an and in Prophet Muhammad صلى الله عليه وسلم) - never will their repentance be accepted [because they repent only by their tongues and not from their hearts]. And they are those who are astray.

(3) Among those who are Jews, there are some who displace words from (their) right places and say: "We hear your word (O Muhammad صلى الله عليه وسلم and disobey," and "Hear and let you (O Muhammad صلى الله عليه وسلم) hear nothing." And Ra'ina with a twist of their tongues and as a mockery of the religion (Islam). And if only they had said: "We hear and obey", and "Do make us understand," it would have been better for them, and more proper; but Allah has cursed them for their disbelief, so they believe not except a few.

(4) Those among the Children of Israel who disbelieved were cursed by the tongue of Dawud (David) and 'Îsa (Jesus), son of Maryam (Mary). That was because they disobeyed (Allah and the Messengers) and were ever transgressing beyond bounds.

(5) And had We willed, We would surely have elevated him therewith but he clung to the earth and followed his own vain desire. So his parable is the parable of a dog: if you drive him away, he lolls his tongue out, or if you leave him alone, he (still) lolls his tongue out. Such is the parable of the people who reject Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.). So relate the stories, perhaps they may reflect.

(6) O you who believe! When you meet (an enemy) force, take a firm stand against them and remember the Name of Allah much (both with tongue and mind), so that you may be successful.

(7) They assign to Allah that which they dislike (for themselves), and their tongues assert the falsehood that the better things will be theirs. No doubt for them is the Fire, and they will be the first to be hastened on into it, and left there neglected. (Tafsir Al-Qurtubi)

(8) And indeed We know that they (polytheists and pagans) say: "It is only a human being who teaches him (Muhammad صلى الله عليه و سلم)." The tongue of the man they refer to is foreign, while this (the Qur'an) is a clear Arabic tongue.

(9) And say not concerning that which your tongues put forth falsely: "This is lawful and this is forbidden," so as to invent lies against Allah. Verily, those who invent lies against Allah will never prosper.

(10) And We gave them of Our Mercy (a good provision in plenty), and We granted them honour on the tongues (of all the nations, i.e. everybody remembers them with a good praise).