Jihad
Malik :: Book 21 : Hadith 21.17.38
Yahya related to me from Malik from Yahya ibn Said that Umar ibn al-Khattab in one year gave 40,000 camels as mounts. Sometimes he would give one man a camel to himself. Sometimes he would give one camel between two men to take them to Iraq. A man from Iraq came to him and said, "Give Suhaym and I a mount.''Umar ibn al-Khattab said to him,"l demand from you, by Allah!, is Suhaym a water skin?" He said, "Yes."