And Our command is but one, like a glance of the eye. (54:50)

Almuntakhab Fi Tafsir Alquran Alkarim

Thus, Our command to bring into being anything, spiritual animate or inanimate, or to bring into effect any proceedings is but a single act executed instantaneously, like the twinkle of an eye

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(54:50) Our command consists of only one Word which is carried out in the twinkling of an eye. *26

And Our command is but one, like a glance of the eye. meaning

*26) That is, 'We shall not have to make any lengthy preparations for bringing about Resurrection, nor will it take long to come. For no sooner will a Command be issued forth from Us than it will take place in the twinkling of an eve. "
 

And Our command is but one, like a glance of the eye. meaning in Urdu

اور ہمارا حکم بس ایک ہی حکم ہوتا ہے اور پلک جھپکاتے وہ عمل میں آ جاتا ہے