(Muhammad Assad)
39:55 And ere that suffering comes upon you of a sudden, without your being aware [of its approach], follow the most goodly [teaching] that has been revealed unto you by your Sustainer,39:55
(Yousaf Ali)
39:55 "And follow the best of (the courses) revealed to you from your Lord, before the Penalty comes on you - of a sudden while ye perceive not!-39:55