It is narrated from Hazrat Abu Darda (may Allah be pleased with him) that once the Prophet (peace and blessings be upon him) saw a woman outside a tent who was near the time of childbirth. The Prophet (peace and blessings be upon him) said, "It seems that her master wants to 'approach' her?" The people said, "Yes!" The Prophet (peace and blessings be upon him) said, "My heart wishes to curse him with such a curse that it would remain with him till his grave. How can he make her his heir when she is not lawful for him, and how can he take service from her when she is not lawful for him?"