"And of those around you of the desert Arabs, there are hypocrites and of the people of Madinah (also) -- they persist in hypocrisy. Thou knowest them not; We know them. We will chastise them twice, then they will be turned back to a grievous chastisement. And others have acknowledged their faults, -- they mixed a good deed with another that was evil. It may be that Allah will turn to them (mercifully). Surely Allah is Forgiving, Merciful. Take alms out of their property -- thou wouldst cleanse them and purify them thereby -- and pray for them. Surely thy prayer is a relief to them. And Allah is Hearing, Knowing."