Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) narrates from the Prophet (peace and blessings be upon him) that when he (peace and blessings be upon him) intended to go out for jihad, he said: "O company of the Muhajirun and the Ansar! Among your brothers are people who have neither wealth nor clan, so let each of you take two or three men along with him." Each of us had a turn (on the camel) just like the turn they had. The narrator says: I took two or three men along with me, and my turn was just like theirs.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18573