"And it is not your wealth, nor your children, that bring you closer to Us in position," - al-zulfa means: closeness. "Except for him who has believed," meaning: there is no closeness to Us except for one who believes and does righteous deeds. "For them there will be a double reward," meaning: the multiplication of good deeds, like His saying: "Whoever comes with a good deed will have ten times the like thereof." Then, it was revealed after that in Medina: "The example of those who spend their wealth in the way of Allah is like a seed of grain that grows seven spikes," up to the end of the verse.