It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) intended to go on a military expedition and said: "O company of the Muhajirun and the Ansar, among your brothers are some people who have neither wealth nor tribe, so let each of you take two or three men along with him. And we have room to ride our camel only by turns, just as each one of them will have his turn." Jabir (may Allah be pleased with him) said: So I too took two or three people along with me, and my situation was that I had only as many turns riding the camel as each one of them had. This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.