Adultery

Adultery in Islam is a great sin punishable by stoning and sin. But a Muslim can commit adultery with his maid or a married woman if he invades her town and captures her in the war.

[al-Mu’minun 23:1-7] The believers must (eventually) win through,-2] Those who humble themselves in their prayers; 3] Who avoid vain talk; 4] Who are active in deeds of charity; 5] Who abstain from sex, 6] Except with those joined to them in the marriage bond, or (the captives) whom their right hands possess,- for (in their case) they are free from blame, :7] But those whose desires exceed those limits are transgressors;-

[Al Nisa 4:24] “And all married women (are forbidden unto you) save those (captives) whom your right hands possess.”