Abu Hurairah reported,

The Messenger of Allah ﷺ said, "You will not enter Paradise until you believe, and you will not believe until you love one another. Shall I tell you of something which, if you do it, will make you love one another? Spread the greeting of peace among yourselves."The Messenger of Allah ﷺ said, "By Him in whose hand my soul rests, you will not enter Paradise until you believe," and the rest is like the report of Abu Muawiya and Waki.

Muslim 195

Sahih

وحدثني زهير بن حرب، أنبأنا جرير، عن الأعمش، بهذا الإسناد قال قال رسول الله ﷺ والذي نفسي بيده لا تدخلون الجنة حتى تؤمنوا. بمثل حديث أبي معاوية ووكيع.

مسلم 195صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Faith
Chapter
Clarification that none shall enter Paradise except the believers, that love for the believers is part of faith, and that spreading the greeting of peace is a means to attain it
Numbering
Darussalam 195
Muslim 195