The word(s) "ungrateful" appears 20 time(s) in 16 verse(s) in Quran in Mohsin Khan translation.

(1) Therefore remember Me (by praying, glorifying), I will remember you, and be grateful to Me (for My countless Favours on you) and never be ungrateful to Me.

(2) And what think those who invent a lie against Allah, on the Day of Resurrection? [i.e. Do they think that they will be forgiven and excused! Nay, they will have an eternal punishment in the Fire of Hell]. Truly, Allah is full of Bounty to mankind, but most of them are ungrateful.

(3) And if We give man a taste of Mercy from Us, and then withdraw it from him, verily! he is despairing, ungrateful.

(4) But if We let him taste good (favour) after evil (poverty and harm) has touched him, he is sure to say: "Ills have departed from me." Surely, he is exultant, and boastful (ungrateful to Allah).

(5) For him (each person), there are angels in succession, before and behind him. They guard him by the Command of Allah. Verily! Allah will not change the (good) condition of a people as long as they do not change their state (of goodness) themselves (by committing sins and by being ungrateful and disobedient to Allah). But when Allah wills a people's punishment, there can be no turning back of it, and they will find besides Him no protector.

(6) So (as a result of that) they deny (with ungratefulness) that (Allah's Favours) which We have bestowed on them! Then enjoy yourselves (your short stay), but you will come to know (with regrets).

(7) And Allah puts forward the example of a township (Makkah), that dwelt secure and well-content: its provision coming to it in abundance from every place, but it (its people) denied the Favours of Allah (with ungratefulness). So Allah made it taste extreme of hunger (famine) and fear, because of that (evil, i.e. denying Prophet Muhammad صلى الله عليه و سلم) which they (its people) used to do .

(8) Verily, the spendthrifts are brothers of the Shayatin (devils), and the Shaitan (Devil-Satan) is ever ungrateful to his Lord.

(9) And when harm touches you upon the sea, those that you call upon vanish from you except Him (Allah Alone). But when He brings you safe to land, you turn away (from Him). And man is ever ungrateful .

(10) One with whom was knowledge of the Scripture said: "I will bring it to you within the twinkling of an eye!" Then when he [Sulaiman (Solomon)] saw it placed before him, he said: "This is by the Grace of my Lord - to test me whether I am grateful or ungrateful! And whoever is grateful, truly, his gratitude is for (the good of) his ownself; and whoever is ungrateful, (he is ungrateful only for the loss of his ownself). Certainly my Lord is Rich (Free of all needs), Bountiful."