Allah Almighty says: {and do good so that you may succeed.} [Surat al-Hajj: 77]
1) Fulfilling the needs of Muslims is part of the enjoined doing of good.
2) Doing good is one of the greatest reasons for success.
224/1- Ibn ‘Umar (may Allah be pleased with him and his father) reported that the Messenger of Allah (may Allah’s peace and blessings be upon him) said: “A Muslim is the brother of a Muslim; he neither oppresses him nor hand him over (to an oppressor). Whoever fulfills the needs of his brother, Allah will fulfill his needs; whoever removes the trouble of his brother, Allah will remove his trouble on the Day of Resurrection; and whoever covers up the fault of a Muslim, Allah will cover up his fault on the Day of Resurrection.” [Narrated by Al-Bukhāri and Muslim]
245/2- Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah’s peace and blessings be upon him) said: “Whoever relieves a believer from one of the hardships of this worldly life, Allah will relieve him of one of the hardships of the Day of Resurrection, and whoever makes it easy for an insolvent debtor, Allah will make it easy for him in the worldly life and in the Hereafter, and whoever conceals the fault of a Muslim, Allah will conceal his fault in the worldly life and the Hereafter. And Allah will aid His slave so long as he aids his brother. Whoever follows a path in pursuit of knowledge, Allah will facilitate for him a path to Paradise. No people gather in one of the houses of Allah to recite the Book of Allah and study it together except that tranquility descends upon them, mercy engulfs them, angels surround them, and Allah mentions them among those who are with Him, and he who lags behind in doing good deeds, his noble lineage will not make him go ahead faster.” [Narrated by Muslim]
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1) The Hadīth urges Muslims to relieve the distress of other Muslims and seek to fulfill their needs. Whoever does this will receive a reward similar to his deed in the worldly life and the Hereafter.
2) The believers are encouraged to cooperate with one another; {Cooperate with one another in goodness and righteousness}
3) The believers integrate with one another in having their needs fulfilled.