Musannaf Ibn Abi Shaybah

When the covering was not placed on the Ka'bah, Ibn Umar (may Allah be pleased with them both) would remove the cloth or skin of his sacrificial animal before sacrificing it and deposit it in the treasury of the Ka'bah so that it could be placed on the Ka'bah. Then, when the covering began to be placed on the Ka'bah, he abandoned this practice.