An imperative may establish an obligation to perform an act, while recurrence of that obligation is a separate inquiry. Daily prayer does not recur simply because one assumes the imperative must always repeat; the renewal of its cause and the rulings of appointed times matter.
A flawed argument says, “All commands imply indefinite repetition, since prayer is repeated.” This mistakes the specific recurrent causes of an act of worship for proof about the general meaning of the imperative form.
Correction: Analyze the unqualified imperative first, then establish recurrence in the particular act through time, cause, and other evidence. Two sound propositions should not be collapsed into one faulty generalization.