And verily We sent forth among every community a messenger, [to say] ‘Worship God…’He said:Worship (ʿibāda) is the adornment of mystics (ʿārifūn). Furthermore, the best that one who is knowledgeable can do in the fields of worship [or servanthood, ʿubūdiyya] and service (khidma) is to give up that which is his [right] (mā lahu) for that which is his duty (mā ʿalayhi). His words: