Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them) that the Messenger of Allah (peace and blessings be upon him) said: "A believer is dignified (serious) and gentle, like a familiar camel: if its rein is held and it is led forward, it follows; and if it is driven from behind, it moves; and if you make it sit on a rock, it sits."