Ан-Ниса 4:77

The opponents of Islam in Makkah used to persecute Muslims before the Migration. They resorted to all kinds of aggression and injustice against the Muslims, such as assault, destruction of their means of livelihood, stopping them from praying in the Kabah, not permitting them to spread the word of God, compelling them to leave their homes, etc. Whoever accepted Islam was subjected to all types of pressures to abandon his new faith and return to his ancestral religion. This unjust and aggressive stance of the opponents of Islam had, in principle, made it basically legitimate for the Muslims to take up arms against them; and therefore, the oppressed Muslims approached the Prophet repeatedly to seek his permission to fight. But the Prophet always restrained them, saying that he had not been given permission for armed confrontation. Instead, he advised the Muslims to be patient, say their prayers (salat) and pay the obligatory alms (zakat). The reason for this restraint was that premature and untimely action is not the way of Islam. The Muslims were not powerful enough in Makkah to take decisive action against their enemies. An armed confrontation at that time would have intensified their affliction. It would have amounted to giving the Makkans justification to declare open war against the Muslims, instead of there being just stray incidents of tyranny at the individual level. A practical step may be taken only when the necessary preparations have been made for it. Before reaching this stage, the faithful are required only to fulfil their personal obligations, which must be attended to under all circumstances. These obligations are to seek closeness with God, pay others their rightful dues and endure the difficulties encountered in the path of religion.