Not for a moment be inattentive!

Hazrat Hakeemul Ummat Moulana Ashraf Ali Thanvi ra used to recite this verse often in his discourses؛

یک چشم زدن غافل ازآن شاہ نباشی
شاید کہ نگاہے کند آگاہ نباشیNot even for the duration of eyelid’s flick be inattentive (i.e. commit any sin) of the eternal King (Allah swt),
It is possible that He might be attentive towards you at that time and you being preoccupied will not know this.