Amatul Rahmân Omer:
Allâh sets forth (for your knowledge) an excellent description of a slave who is owned (by another), (and) who has no power over anything. On the other hand there is another (a free man) whom We have provided with goodly provision from Ourself and he spends out of it secretly and openly (in Our cause). Can they both be alike? (No, not at all.) All true and perfect praise belongs to Allâh, but the thing is, most of these people do not know.
