21:40 bal ta'tiyhim bagtatan fa tabhatuhum falaa yastaTiy'UUna rad-dahaa wa laa hum yunZaruun

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Ahmed Raza Khan: Mohammed Aqib Qadri:
In fact it will suddenly come upon them, therefore shocking them, and they will not be able to repel it nor will they be given respite.

Yusuf Ali:
Nay, it may come to them all of a sudden and confound them: no power will they have then to avert it, nor will they (then) get respite.

Pickthal:
Nay, but it will come upon them unawares so that it will stupefy them, and they will be unable to repel it, neither will they be reprieved.