1 verse has
“thankless”
in Edition Clear Qur'an by Talal Itani / Al-Israa (The Night Journey)
17:67When harm afflicts you at sea, those you pray to vanish, except for Him. But when He saves you to land, you turn away. The human being is ever thankless.
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Those who spend their wealth by night and day, privately and publicly, will receive their reward from their Lord. They have nothing to fear, nor shall they grieve.
The Holy Quran · Al-Baqara (The Cow) · 2:274