Anas (RAA) narrated that the Messenger of Allah (ﷺ) said:
"By Him in Whose Hand my soul is, a slave of Allah does not truly believe till he wishes for his neighbor what he wishes for himself." Agreed upon. (DE)
English reference (DE): Book 16, Hadith 1501 (DE)
Arabic reference (DE): Book 16, Hadith 1458 (DE)