Musannaf Ibn Abi Shaybah 12995 — One who says: I owe a sacrificial

It is narrated from Sallam bin Miskin that Jabir bin Zayd and al-Hasan were asked about a woman who had made it binding upon herself to send a hady (sacrificial animal). Jabir bin Zayd said: If she is well-off, she should send a cow, and if she is poor, a sheep.