`Ali b. Ahmad b. `Abdullah b. Ahmad b. `Abdullah al-Barqi narrated to us. He said: My father narrated to us from his grandfather Ahmad b. Abi `Abdillah from al-Hasan b. `Ali b. Faddal from Ibrahim b. Muhammad al-Ash`ari from Aban b. `Abd al-Malik from al-Sadiq Ja`far b. Muhammad . He said:

When Musa b. `Imran wanted to part from al-Khidr , he said to him: Advise me. So, from among that which he advised him, he said to him: Beware of bickering, and of walking (traversing) without need, and of laughing without astonishment. Remember your mistakes and beware of [mentioning] the mistakes of the people.