أَيَنْفَعُ الْوَعْدُ إِذَا تَأَخَّرَ الْعَمَلُ؟
What use is a promise when action is delayed?
Within an exhortation to act, the question challenges complacency and may convey rhetorical denial or reproach. Without this setting the wording could also be a sincere inquiry into the usefulness of promises.
Changing it to a declarative “A promise brings no benefit when action is delayed” supplies the conclusion directly; the interrogative invites the audience to make that inference. The preferred form depends on purpose.