Udaysah bint Uhban bin Sayfi (may Allah have mercy on her) said: When Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) came to Basrah, he came to my father (Uhban), stood at the door and said: As-salamu alaykum wa rahmatullah. Sayyiduna Ali (may Allah be pleased with him) said: Will you not come out and help me against these people? My father said: Certainly, if you wish. O slave girl, hand me the sword. So the slave girl handed him the sword, and he placed it in his lap, then drew it from its sheath and said: "My close friend and your cousin (peace and blessings be upon him) commanded me that when there is fighting between two tribes of the Muslims, I should take up a sword of wood." Then he drew it out a little while it was in his lap and said: If you wish, I will go out with you with this. Sayyiduna Ali (may Allah be pleased with him) said: I have no need of you.
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 859