Musannaf Ibn Abi Shaybah

Hazrat Dawood, may Allah have mercy on him, says that I asked Hazrat Sha’bi, may Allah have mercy on him, that Hazrat Abu Musa, may Allah be pleased with him, had said on the day of the conquest of Tustar that no intercourse should be had with a pregnant woman and there should be no sharing in the offspring of the polytheists, because the water (semen) increases in the child. Did he say this from his own opinion or did he narrate it from the Messenger of Allah, peace and blessings be upon him? He replied that the Messenger of Allah, peace and blessings be upon him, had said on the day of the conquest of Autas that no intercourse should be had with a pregnant woman before the birth of her child, and with other women until it is known that their wombs are empty.