وَاَنْكِحُوا الْاَيَامٰى مِنْكُمْ وَالصّٰلِحِيْنَ مِنْ عِبَادِكُمْ وَاِمَاۤىِٕكُمْۗ اِنْ يَّكُوْنُوْا فُقَرَاۤءَ يُغْنِهِمُ اللّٰهُ مِنْ فَضْلِهٖۗ وَاللّٰهُ وَاسِعٌ عَلِيْمٌ ( النور: ٣٢ )
Wa ankihul ayaamaa minkum was saaliheena min 'ibaadikum wa imaa'kum; iny-yakoonoo fuqaraaa'a yughni himul laahu min fadlih; wal laahu Waasi'un 'Aleem (an-Nūr 24:32)
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. (An-Nur  : 32)
1 Mufti Taqi Usmani
Arrange the marriage of the spouseless among you, and the capable from among your bondmen and bondwomen. If they are poor, Allah will enrich them out of His grace. Allah is All-Encompassing, All-Knowing.