Musannaf Ibn Abi Shaybah

Hazrat Wabra bin Abdur Rahman says that I came to Hazrat Ibn Umar (may Allah be pleased with them) and said to him: I am liable for a Hadi (sacrificial animal), which animal do you advise me to offer? He replied: It should be from among cows, or else three or seven days of fasting when you return to your family, and these fasts are more preferable to me than a goat.