An-Nur 24:32

وَأَنكِحُواْ ٱلۡأَيَٰمَىٰ مِنكُمۡ وَٱلصَّـٰلِحِينَ مِنۡ عِبَادِكُمۡ وَإِمَآئِكُمۡۚ إِن يَكُونُواْ فُقَرَآءَ يُغۡنِهِمُ ٱللَّهُ مِن فَضۡلِهِۦۗ وَٱللَّهُ وَٰسِعٌ عَلِيمٞ 32

And marry the unmarried among you and the righteous among your male slaves and female slaves. If they should be poor, Allah will enrich them from His bounty, and Allah is all-Encompassing and Knowing