Allah's Apostle (pbuh) 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."