Sayyiduna Abdullah bin Salam (may Allah be pleased with him) narrates: When the Messenger of Allah (peace and blessings be upon him) came to Madinah, the people rushed out towards him in crowds, and I was among those who went out. When I saw his blessed face, I recognised that this could not be the face of a liar. The first thing I heard from him (peace and blessings be upon him) was: "Feed (others), spread the greeting of salam, and pray at night while people are asleep; you will enter Paradise in peace."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13982