Sayyiduna Imran bin Husayn (may Allah be pleased with him) said: One day the Prophet (peace and blessings be upon him) gathered Banu Hashim and said to them: "O Banu Hashim, I cannot avail you anything against Allah. O Banu Hashim, my true allies among you are the God-fearing. O Banu Hashim, protect yourselves from the Fire, even if with half a date. O Banu Hashim, let me not find you coming carrying the world on your backs, and coming carrying the Hereafter as well."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15445