The word(s) "tribe" appears 40 time(s) in 39 verse(s) in Quran in Muhammad Pickthal translation.

(21) And when he came unto the water of Midian he found there a whole tribe of men, watering. And he found apart from them two women keeping back (their flocks). He said: What aileth you? The two said: We cannot give (our flocks) to drink till the shepherds return from the water; and our father is a very old man.

(22) And (the tribes of) A'ad and Thamud! (Their fate) is manifest unto you from their (ruined and deserted) dwellings. Satan made their deeds seem fair unto them and so debarred them from the Way, though they were keen observers.

(23) The folk of Noah before them denied (their messenger) and (so did the tribe of) A'ad, and Pharaoh firmly planted,

(24) And (the tribe of) Thamud, and the folk of Lot, and the dwellers in the wood: these were the factions.

(25) But if they turn away, then say: I warn you of a thunderbolt like the thunderbolt (which fell of old upon the tribes) of A'ad and Thamud;

(26) O mankind! Lo! We have created you male and female, and have made you nations and tribes that ye may know one another. Lo! the noblest of you, in the sight of Allah, is the best in conduct. Lo! Allah is Knower, Aware.

(27) The folk of Noah denied (the truth) before them, and (so did) the dwellers at Ar-Rass and (the tribe of) Thamud,

(28) And (the tribe of) A'ad, and Pharaoh, and the brethren of Lot,

(29) And in (the tribe of) A'ad (there is a portent) when we sent the fatal wind against them.

(30) And in (the tribe of) Thamud (there is a portent) when it was told them: Take your ease awhile.