What was the occasion for the revelation of the verse (And do not throw yourselves with your own hands into destruction)?

The reason for the revelation of the verse: "And spend in the way of Allah and do not throw [yourselves] with your [own] hands into destruction. And do good; indeed, Allah loves the doers of good" is that it was revealed concerning the Ansar when they considered abandoning jihad and dedicating themselves to managing their wealth after Allah had strengthened Islam. The verse then clarified that destruction is the abandonment of warfare and the preoccupation with wealth, and the lesson lies in the generality of the wording, not the specificity of the cause.