It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "I will reach the Pond before you, and I will boast of you over the other nations, so do not fight and kill one another after me."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10364