It is narrated from Abdur Rahman bin Yazid bin Jabir, may Allah have mercy on him, that Sayyiduna Ka'b, may Allah be pleased with him, used to say: "The sustenance of this Ummah is at the tips of their spears and with their bows as long as they do not engage in agriculture. When they engage in agriculture, they will become like common people, and Allah, the Mighty and Majestic, will continue to grant them until He gives them the best of livestock to ride."