Surah Al-Baqarah 2:138

صِبْغَةَ ٱللَّهِ ۖ وَمَنْ أَحْسَنُ مِنَ ٱللَّهِ صِبْغَةً ۖ وَنَحْنُ لَهُۥ عَـٰبِدُونَ

[And say, "Ours is] the religion of Allāh. And who is better than Allāh in [ordaining] religion? And we are worshippers of Him."

Translation: Saheeh International

Tafsir

The mark of God sibghata’Llāhi a verbal noun reaffirming the earlier āmannā and it is in the accusative because of the verbal construction implied that is to say sabaghanā’Llāhu ‘God has marked us’ this denotes His religion the one towards which He made human beings naturally inclined as it leaves its mark on a person …

Excerpt from Tafsir al-Jalalayn, commentary on 2:138, via Quran.com. The reader has the full commentary and 9 more tafsirs.