Ruwaifi bin Thabit narrated that: the Prophet said: "Whoever believes in Allah and the Last Day, then he does not levy his water on someone else's child."

It is narrated from ‘Irbad bin Sariyah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) forbade having intercourse with captive pregnant women until they give birth to the children in their wombs 1. Imam Tirmidhi says:
1- The hadith of ‘Irbad (may Allah be pleased with him) is gharib (rare),
2- In this chapter, there is also a narration from Ruwaifi‘ bin Thabit (may Allah be pleased with him),
3- The people of knowledge act upon this, Al-Awza‘i says: When a person buys a slave woman from among the captive women and she is pregnant, there is a narration from ‘Umar bin Khattab, he said: If she is pregnant, intercourse should not take place with her until she gives birth,
4- Al-Awza‘i says: As for free women, the established Sunnah is that they are ordered to observe the waiting period (‘iddah).