Hazrat Awza'i narrates from the mentioned chain from the Prophet Muhammad (peace be upon him) that "To keep the greeting (salam) brief is Sunnah." Imam Abu Bakr (may Allah have mercy on him) says that this narration has been reported by Isa bin Yunus, Ibn Mubarak, and Muhammad bin Yahya from the chain of Faryabi from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Prophet (peace be upon him) said: "To keep the greeting (salam) brief is Sunnah."