Surah Al-Ahzab, ayah 5

ٱدۡعُوهُمۡ لِأٓبَآئِهِمۡ هُوَ أَقۡسَطُ عِندَ ٱللَّهِۚ فَإِن لَّمۡ تَعۡلَمُوٓاْ ءَابَآءَهُمۡ فَإِخۡوَٰنُكُمۡ فِي ٱلدِّينِ وَمَوَٰلِيكُمۡۚ وَلَيۡسَ عَلَيۡكُمۡ جُنَاحٞ فِيمَآ أَخۡطَأۡتُم بِهِۦ وَلَٰكِن مَّا تَعَمَّدَتۡ قُلُوبُكُمۡۚ وَكَانَ ٱللَّهُ غَفُورٗا رَّحِيمًا ٥

Ud'ūhum li'ābā'ihim huwa aqsatu 'indallāhi fa il lam ta'lamū ābā'ahum fa ikhwānukum fid-dīni wamawālīkum walaysa 'alaykum junāhun fīmā akhta'tum bihī walākim mā ta'ammadat qulūbukum wakānallāhu ghafūrar rahīmā

Call them¹¹⁸¹ by [the names of] their fathers; it is more just in the sight of Allāh. But if you do not know their fathers - then they are [still] your brothers in religion and those entrusted to you. And there is no blame upon you for that in which you have erred but [only for] what your hearts intended. And ever is Allāh Forgiving and Merciful.