(3) باب لاَ يَظْلِمُ الْمُسْلِمُ الْمُسْلِمَ وَلاَ يُسْلِمُهُ
Narrated `Abdullah bin `Umar:
Allah's Messenger (ﷺ) said, "A Muslim is a brother of another Muslim, so he should not oppress him, nor should he hand him over to an oppressor. Whoever fulfilled the needs of his brother, Allah will fulfill his needs; whoever brought his (Muslim) brother out of a discomfort, Allah will bring him out of the discomforts of the Day of Resurrection, and whoever screened a Muslim, Allah will screen him on the Day of Resurrection . "
Reference: Sahih al-Bukhari 2442
In-book reference: Book 46, Hadith 3
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 43, Hadith 622