Formula for Gaining Entry into Paradise

عن عبد الله بن سلام رضي الله عنه قال لما قدم النبي صلى الله عليه و سلم المدينة انجفل الناس قبله . وقيل قد قدم رسول الله صلى الله عليه و سلم قد قدم رسول الله . قد قدم رسول الله . ثلاثا . فجئت في الناس لأنظر . فلما تبينت وجهه عرفت أن وجهه ليس بوجه كذاب . فكان أول شيء سمعته تكلم به أن قال: يا أيها الناس أفشوا السلام وأطعموا الطعام وصلوا الأرحام وصلوا بالليل والناس نيام تدخلوا الجنة بسلام. (ابن ماجة ص234)

Hadhrat Abdullah ibn Salaam (Radhiyallahu Anhu) reports that at the time Rasulullah (Sallallahu Alaihi Wasallam) migrated to Madina Tayyibah, the people of Madina Tayyiba rushed to receive him. I heard someone call out thrice: The messenger of Allah has arrived; the messenger of Allah has arrived; the messenger of Allah has arrived. I also proceeded with the people to observe for myself (the personality in regard to whom people claim to be a Messenger of Allah, though I had not yet embraced Islam till then). No sooner did my sight fall on the mubaarak countenance of Rasulullah (Sallallahu Alaihi Wasallam) I was convinced this face cannot be the face of an imposter or liar. The first words I heard him utter while addressing the people (at that happy occasion) was: O people! Make salaam a common practice amongst yourselves (at the time of meeting each other), feed the creation, join family ties, stand up in salaah during night while people are asleep, in this way you shall be blessed to enter Paradise with peace.