سورة An-Noor ( The Light ) - الآية 32

And marry those among you who are single (i.e. a man who has no wife and the woman who has no husband) and (also marry) the Salihun (pious, fit and capable ones) of your (male) slaves and maid-servants (female slaves). If they be poor, Allah will enrich them out of His Bounty. And Allah is All-Sufficent for His creatures' needs, All-Knowing (about the state of the people).