[Quran – 47:36] “The present, worldly life is nothing but a play and a pastime… If you truly believe and keep from disobedience to Him in reverence for Him and piety, He will grant you your rewards, and will not ask of you your wealth.”

[EXPLAINED by Muhammad Asad] “Although the life of this world is “but a play and a passing delight”, God does not want to deprive the believers of its rightful enjoyment: and so He expects them to sacrifice only a small part of their possessions in His cause. This passage evidently foreshadows the imposition of the obligatory annual tax called zakah (“the purifying dues”), amounting to about 2.5 percent of a Muslims’s income and property, as pointed out by most of the classical commentators in connection with the above verse (hence my interpolation). The proceeds of this tax are to be utilized in what the Qur’an describes as “the cause [lit., “way”] of God”, i.e., for the defense and propagation of the Faith and the welfare of the community; and its spiritual purpose is the “purification” of a Muslim’s possessions from the blemish of greed and selfishness. (It is to be noted that the payment of zakah was made obligatory at the very beginning of the Medina period, that is, at approximately the same time as the revelation of the present surah.)”