Musannaf Ibn Abi Shayba 13:3213

Abu Bakr narrated to us, he said: Ad-Dahhak ibn Makhlad narrated to us, from Ibn Jurayj, he said: Sulayman, the freed slave of Al-Barsa', informed me, he said: I sold an item or a sale to Ibn Umar. He said: "If our provisions come to us within three [days], then the item is ours. And if our provisions do not come to us within three [days], then there is no sale between us and you, and we will initiate a new sale regarding it."