Quran 9:120 — Ultimatum (Bara'ah)

Neither the dwellers of the city, nor the Arabs around them, shall seek to stay behind the messenger of GOD (when he mobilizes for war). Nor shall they give priority to their own affairs over supporting him. This is because they do not suffer any thirst, or any effort, or hunger in the cause of GOD, or make a single step that enrages the disbelievers, or inflict any hardship upon the enemy, without having it written down for them as a credit. GOD never fails to recompense those who work righteousness.

[9:119] O you who believe, you shall reverence GOD, and be among the truthful.

[9:121] Nor do they incur any expense, small or large, nor do they cross any valley, without having the credit written down for them. GOD will surely reward them generously for their works.