An-Nisaa 4:3

If you fear that you may not maintain justice with orphan girls [by marrying them] then marry women of your choice—two, three, or four[3]; but if you fear that you may not maintain justice, then marry only one, or slave-girls you may own. That is more likely to avoid committing injustice.

[3] ‘Ā’ishah (رضي الله عنها) said: “This verse was revealed concerning any man under whom is an orphan girl for whom he is both guardian and inheritor, while she has money and with no one to argue in her favor. This guardian is enjoined not to marry her for her money, nor is he to beat or molest her in the process. In this respect, Allah says: “If you fear that you may not maintain justice with orphan girls [by marrying them] then marry women of your choice”. That is, He, the Almighty, is saying: “These I made lawful for you, and leave out those that you may be unfair to.”” [Al-Bukhārī: 4573, Muslim: 3018]

And if you fear that you will not deal justly with the orphan girls, then marry those that please you of [other] women, two or three or four. But if you fear that you will not be just, then [marry only] one or those your right hands possess [i.e., slaves]. That is more suitable that you may not incline [to injustice].

3. And if you fear that you shall not be able to deal justly with the orphan-girls then marry (other) women of your choice, two or three, or four; but if you fear that you shall not be able to deal justly (with them), then only one or (the slaves) that your right hands possess. That is nearer to prevent you from doing injustice.

And if ye fear that ye will not deal fairly by the orphans, marry of the women, who seem good to you, two or three or four; and if ye fear that ye cannot do justice (to so many) then one (only) or (the captives) that your right hands possess. Thus it is more likely that ye will not do injustice.