Translation:

26. Say: "As to the knowledge of the time it is with Allah alone: I am (sent) only to warn plainly in public."

Notes (Tafseer)

5586. The Judgment is certain to come. But when it will exactly come, is known to Allah alone. The Prophet's duty is to proclaim that fact openly and clearly. It is not for him to punish or to hasten the punishment of evil. Cf. xxii. 47-49.