Sayyiduna Jariyah bin Qudamah (may Allah be pleased with him) narrates from a cousin of his, who said: I said: O Messenger of Allah, teach me something about Islam that will benefit me. He (peace and blessings be upon him) said: "Do not become angry." I repeated my request, but he (peace and blessings be upon him) said nothing more than that.
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2086