Musannaf Ibn Abi Shaybah

Hazrat Mujahid also says that sacrifice is obligatory upon him.

Hasan says regarding the she-camel that gives birth: if someone makes the newborn ride on the she-camel, and then slaughters and eats it, he must slaughter a goat in its place.

Hazrat Ibn Umar (may Allah be pleased with both of them) used to make the young camel ride on it.

Hazrat Ata says that (if there is a baby in the womb of a camel at the time of its slaughter) it should also be slaughtered along with its mother.

Ibrahim says that when a she-camel is slaughtered, her calf (which is in her womb) will also be slaughtered along with her.

Hazrat Ata said regarding the person who was taking a she-camel and the she-camel fell on the way and the man could not make the she-camel stand up, so he said: He may do whatever he wishes with it, and when he comes to Makkah Mukarramah, he should slaughter a goat in place of that camel.