There is no harm in the Prophet doing that which Allah has ordained for him; such has been the course of Allah with respect to those who have gone before; and the command of Allah is a decree that is made absolute:

(Such has been) the course of Allah with respect to those who have gone before; and you shall not find any change in the course of Allah.

Such has been the course of Allah that has indeed run before, and you shall not find a change in Allah's course.