Sura 4:2-4 — Women
[4:2] Give orphans the property which belongs to them. Do not exchange their valuables for worthless things or cheat them of their possessions; for this would surely be a grievous sin. [4:3] If you fear that you cannot treat orphans [orphan girls] with fairness, then you may marry other women who seem good to you: two, three, or four of them. But if you fear that you cannot maintain equality among them, marry one only or any slave-girls you may own. This will make it easier for you to avoid injustice.
[4:4] Give women their dowry as a free gift; but if they choose to make over to you a part of it, you may regard it as lawfully yours.
From N. J. Dawood, The Koran (London: Penguin Books, 2003), page 60.