Conditioning the Delay of Part of a Worker's Salary

Question:
Honorable Shaykh, may Allah grant you success. He says: Is it permissible for a man to condition his worker to delay part of his salary so that he commits to the work assigned to him? And is the money lawful for the employer if this worker runs away and leaves his money?

Answer:
If he conditions that part of the wage is deferred and part is immediate, there is no harm in that; part is deferred, not cut off from him, but deferred, saying, "I will not give it to you until such and such a date." This does not contradict the deferred sale. However, if he says, "I cut it off from you if you do not do such and such," this is not permissible. The Messenger (peace and blessings be upon him) said: When the work is done, give him his wage, and do not delay it. Yes.