ٱلْمُزَّمِّل : ١٧

  • فَكَيۡفَ Then how
  • تَتَّقُونَ will you guard yourselves
  • إِن if
  • كَفَرۡتُمۡ you disbelieve
  • يَوۡمٗا a Day
  • يَجۡعَلُ (that) will make
  • ٱلۡوِلۡدَٰنَ the children
  • شِيبًا gray-headed
Then how can you fear, if you disbelieve, a Day that will make the children white-haired?1
Footnotes
1 Another meaning is "How can you avoid [punishment]" on such a Day?
So, if you disbelieve, in this world, how will you guard against a day (yawman is the direct object of tattaqoona, 'you guard against') that is, against the chastisement thereof, by what defence will you defend yourselves against the chastisement of a day, that will make the children grey-haired (sheeb is the plural of ashyab) by the severity of its terrors, this being the Day of Resurrection (the sheen of sheeb should actually have a damma, but it is given a kasra because of its [phonetic] affinity with the yaa') - a distressing day is described as being 'a day that makes the forelocks of children turn grey', which is [usually] understood figuratively; but it may be that in the case of this verse it is meant literally -