It is narrated from Nafi' (may Allah have mercy on him) that whenever Sayyiduna Ibn Umar (may Allah be pleased with them both) gave someone a camel to ride for jihad, he would stipulate to him that he must not destroy it before reaching Wadi al-Qura, or what lies level with it on the road to Egypt. Once he had left that place behind, it was like his own property, and he could do with it whatever he wished.