Whoever relieves a believer of distress

On the authority of Abu Hurayra (may Allah be pleased with him), that the Prophet (may Allah bless him and grant him peace) said: "Whoever relieves a believer of a distress of this world, Allah will relieve him of a distress on the Day of Resurrection. Whoever eases the way for one in difficulty, Allah will ease the way for him in this world and the next. Whoever conceals the fault of a Muslim, Allah will conceal his faults in this world and the next. Allah helps His servant so long as the servant helps his brother. Whoever treads a path in search of knowledge, Allah will make easy for him a path to Paradise. No people gather in one of the houses of Allah, reciting the Book of Allah and studying it together, but tranquillity descends upon them, mercy covers them, the angels surround them, and Allah mentions them to those who are with Him. And whoever is slowed by his deeds will not be hastened by his lineage."

Related by Muslim with this wording.

[Muslim 2699]