Translation:

57. Say: "For me I (work) on a clear Sign from my Lord but ye reject Him. What ye would see hastened is not in my power. The Command rests with none but Allah: He declares the truth and He is the best of Judges."

Notes (Tafseer)

877. What ye would see hastened: what ye, deniers of God, are so impatient about: the punishment which ye mockingly say does not come to you. Cf. xiii. 6.