Jabir ibn 'Abdullah · Chapters on Sacrifices

“The Messenger of Allah (ﷺ) used to sacrifice two horned, black-and-white rams and he would say the Name of Allah and pronounce His greatness. I saw him slaughtering them with his own hand, putting his foot on their sides.”

“Camels became scarce at the time of the Messenger of Allah (ﷺ), so he commanded them to sacrifice cows.”