The Messenger of Allah ﷺ said, "None of you truly believes until he loves for his brother," or he said, "for his neighbor, what he loves for himself."
حدثنا محمد بن بشار ومحمد بن المثنى قالا حدثنا محمد بن جعفر حدثنا شعبة قال سمعت قتادة يحدث
أن رسول الله ﷺ قال لا يؤمن أحدكم حتى يحب لأخيه أو قال لجاره ما يحب لنفسه
Bukhari narrated it in the Book of Iman, Chapter: Loving for one's brother what one loves for oneself is part of faith, no. 13, and Muslim in the Book of Iman, Chapter: The proof that among the qualities of faith... etc, no. 45, from the hadith of Shubah, through the same chain.