The word(s) "watch" appears 16 time(s) in 15 verse(s) in Quran in Muhammad Pickthal translation.

(11) Is he who payeth adoration in the watches of the night, prostrate and standing, bewaring of the Hereafter and hoping for the mercy of his Lord, (to be accounted equal with a disbeliever)? Say (unto them, O Muhammad): Are those who know equal with those who know not? But only men of understanding will pay heed.

(12) But watch thou (O Muhammad) for the day when the sky will produce visible smoke

(13) Lo! We are sending the she-camel as a test for them; so watch them and have patience;

(14) Lo! We sent a storm of stones upon them (all) save the family of Lot, whom We rescued in the last watch of the night,

(15) Lo! thy Lord is ever watchful.