The word(s) "behind" appears 62 time(s) in 60 verse(s) in Quran in Muhammad Pickthal translation.

(41) Save an old woman among those who stayed behind;

(42) And he said: Lo! I have preferred the good things (of the world) to the remembrance of my Lord; till they were taken out of sight behind the curtain.

(43) Have they not travelled in the land to see the nature of the consequence for those who disbelieved before them? They were mightier than these in power and (in the) traces (which they left behind them) in the earth. Yet Allah seized them for their sins, and they had no protector from Allah.

(44) Have they not travelled in the land to see the nature of the consequence for those before them? They were more numerous than these, and mightier in power and (in the) traces (which they left behind them) in the earth. But all that they used to earn availed them not.

(45) When their messengers came unto them from before them and behind them, saying: Worship none but Allah! they said: If our Lord had willed, He surely would have sent down angels (unto us), so lo! we are disbelievers in that wherewith ye have been sent.

(46) Falsehood cannot come at it from before it or from behind it. (It is) a revelation from the Wise, the Owner of Praise.

(47) And it was not (vouchsafed) to any mortal that Allah should speak to him unless (it be) by revelation or from behind a veil, or (that) He sendeth a messenger to reveal what He will by His leave. Lo! He is Exalted, Wise.

(48) And leave the sea behind at rest, for lo! they are a drowned host.

(49) How many were the gardens and the watersprings that they left behind,

(50) Those of the wandering Arabs who were left behind will tell thee: Our possessions and our households occupied us, so ask forgiveness for us! They speak with their tongues that which is not in their hearts. Say: Who can avail you aught against Allah, if He intend you hurt or intend you profit? Nay, but Allah is ever Aware of what ye do.