Surah Al-'Adiyat 100:6
إِنَّ ٱلْإِنسَـٰنَ لِرَبِّهِۦ لَكَنُودٌ
Indeed mankind, to his Lord, is ungrateful.
Translation: Saheeh International
Tafsir
Verily man the disbeliever is ungrateful to his Lord thankless denying the reality of His graces exalted be He
Excerpt from Tafsir al-Jalalayn, commentary on 100:6, via Quran.com. The reader has the full commentary and 9 more tafsirs.