Malik said, "The best of what is said about a man who buys the mukatab of a man is that if the man wrote the slaves kitaba for dinars or dirhams, he does not sell him unless it is for merchandise which is paid immediately and not deferred, because if it is deferred, it would be a debt for a debt. A debt for a debt is forbidden." He said, "If the master gives a mukatab his kitaba for certain merchandise of camels, cattle, sheep, or slaves, it is more correct that the buyer buy him for gold, silver, or different goods than the ones his master wrote the kitaba for, and that must be paid immediately, not deferred."