Quran 2:234 — The Heifer (Al-Baqarah)

Those who die and leave wives, their widows shall wait four months and ten days (before they remarry). Once they fulfill their interim, you commit no error by letting them do whatever righteous matters they wish to do. GOD is fully Cognizant of everything you do.

[2:233] Divorced mothers shall nurse their infants two full years, if the father so wishes. The father shall provide the mother's food and clothing equitably. No one shall be burdened beyond his ability. No mother shall be harmed on account of her infant, nor shall the father be harmed because of his infant. (If the father dies), his inheritor shall assume these responsibilities. If the infant's parents mutually agree to part, after due consultation, they commit no error by doing so. You commit no error by hiring nursing mothers, so long as you pay them equitably. You shall observe GOD, and know that GOD is Seer of everything you do.

[2:235] You commit no sin by announcing your engagement to the women, or keeping it secret. GOD knows that you will think about them. Do not meet them secretly, unless you have something righteous to discuss. Do not consummate the marriage until their interim is fulfilled. You should know that GOD knows your innermost thoughts, and observe Him. You should know that GOD is Forgiver, Clement.