The word(s) "ungrateful" appears 37 time(s) in 35 verse(s) in Quran in Muhammad Habib Shakir translation.

(21) So as to be ungrateful for what We have given them; but enjoy yourselves (for a while), for you shall soon come to know.

(22) And certainly We gave wisdom to Luqman, saying: Be grateful to Allah. And whoever is grateful, he is only grateful for his own soul; and whoever is ungrateful, then surely Allah is Self-sufficient, Praised.

(23) And when a wave like mountains covers them they call upon Allah, being sincere to Him in obedience, but when He brings them safe to the land, some of them follow the middle course; and none denies Our signs but every perfidious, ungrateful one.

(24) This We requited them with because they disbelieved; and We do not punish any but the ungrateful.

(25) And (as for) those who disbelieve, for them is the fire of hell; it shall not be finished with them entirely so that they should die, nor shall the chastisement thereof be lightened to them: even thus do We retribute every ungrateful one.

(26) Now, surely, sincere obedience is due to Allah (alone) and (as for) those who take guardians besides Him, (saying), We do not serve them save that they may make us nearer to Allah, surely Allah will judge between them in that in which they differ; surely Allah does not guide him aright who is a liar, ungrateful.

(27) If you are ungrateful, then surely Allah is Self-sufficient above all need of you; and He does not like ungratefulness in His servants; and if you are grateful, He likes it in you; and no bearer of burden shall bear the burden of another; then to your Lord is your return, then will He inform you of what you did; surely He is Cognizant of what is in the breasts.

(28) And when distress afflicts a man he calls upon his Lord turning to Him frequently; then when He makes him possess a favor from Him, he forgets that for which he called upon Him before, and sets up rivals to Allah that he may cause (men) to stray off from His path. Say: Enjoy yourself in your ungratefulness a little, surely you are of the inmates of the fire.

(29) But if they turn aside, We have not sent you as a watcher over them; on you is only to deliver (the message); and surely when We make man taste mercy from Us, he rejoices thereat; and if an evil afflicts them on account of what their hands have already done, then-surely man is ungrateful.

(30) And they assign to Him a part of His servants; man, to be sure, is clearly ungrateful.