“I heard AbāʿAbdillāh (a) say, ‘There is a verse in the Qurʾān that is unrestrictedly applicable [to all].’ I asked, ‘Which [verse] is it?’ He said, ‘The verse wherein Allah, the Blessed and Exalted, says: Is there any reward for goodness except goodness? (Q55:60) – it applies to the disbeliever and the believer, to the righteous and the wicked. Whoever is done a good turn, it is incumbent upon him to reciprocate; and reciprocation does not mean doing the same as what was done for him; rather, he must do good to the extent that he sees that by his action, he has attained the merit of the initiator [of goodness].’”