Al-Mujaadila 58:4

But whoever cannot afford this must fast for two consecutive months[3] before the couple have intimate relations with each other. But if he is unable to do that, he must feed sixty needy people. This is so that you may truly believe in Allah and His Messenger. These are the limits ordained by Allah, and for the disbelievers there will be a painful punishment.

[3] See footnote 4:92.

And he who does not find [a slave] - then a fast for two months consecutively[1640] before they touch one another; and he who is unable - then the feeding of sixty poor persons. That is for you to believe [completely] in Allāh and His Messenger; and those are the limits [set by] Allāh. And for the disbelievers is a painful punishment.

[1640] See footnote to 4:92.

4. And he who finds not (the money for freeing a slave) must fast two successive months before they both touch each other. And he who is unable to do so, should feed sixty Miskîns (poor). That is in order that you may have perfect Faith in Allâh and His Messenger. These are the limits set by Allâh. And for disbelievers, there is a painful torment.

And he who findeth not (the wherewithal), let him fast for two successive months before they touch one another; and for him who is unable to do so (the penance is) the feeding of sixty needy ones. This, that ye may put trust in Allah and His messenger. Such are the limits (imposed by Allah); and for disbelievers is a painful doom.