´It was narrated that Samurah bin Jundab said:` “The Messenger of Allah (ﷺ) commanded us to greet our Imam with Salam, and to greet one another with Salam.”
Hadith ReferenceSunan Ibn Majah / Establishing the Prayer and the Sunnah Regarding Them / Hadith: 922
Hadith Gradingالألبانی:ضعيف | زبیر علی زئی:ضعيف, إسناده ضعيف, سنن أبي داود (1001), انوار الصحيفه، صفحه نمبر 411, -