Quran 2:235 — The Heifer (Al-Baqarah)

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.

[2:234] 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.

[2:236] You commit no error by divorcing the women before touching them, or before setting the dowry for them. In this case, you shall compensate them—the rich as he can afford and the poor as he can afford—an equitable compensation. This is a duty upon the righteous.