Verses with the word back in the New Testament (18 verses):

Matthew 24:18
Neither let him which is in the field return back to take his clothes.

Matthew 28:2
And, behold, there was a great earthquake: for the angel of the Lord descended from heaven, and came and rolled back the stone from the door, and sat upon it.

Mark 13:16
And let him that is in the field not turn back again for to take up his garment.

Luke 2:45
And when they found him not, they turned back again to Jerusalem, seeking him.

Luke 8:37
Then the whole multitude of the country of the Gadarenes round about besought him to depart from them; for they were taken with great fear: and he went up into the ship, and returned back again.

Luke 9:62
And Jesus said unto him, No man, having put his hand to the plough, and looking back, is fit for the kingdom of God.

Luke 17:15
And one of them, when he saw that he was healed, turned back, and with a loud voice glorified God,

Luke 17:31
In that day, he which shall be upon the housetop, and his stuff in the house, let him not come down to take it away: and he that is in the field, let him likewise not return back.

John 6:66
From that time many of his disciples went back, and walked no more with him.

John 20:14
And when she had thus said, she turned herself back, and saw Jesus standing, and knew not that it was Jesus.

Acts 5:2
And kept back part of the price, his wife also being privy to it, and brought a certain part, and laid it at the apostles' feet.

Acts 5:3
But Peter said, Ananias, why hath Satan filled thine heart to lie to the Holy Ghost, and to keep back part of the price of the land?

Acts 7:39
To whom our fathers would not obey, but thrust him from them, and in their hearts turned back again into Egypt,

Acts 20:20
And how I kept back nothing that was profitable unto you, but have shewed you, and have taught you publickly, and from house to house,

Romans 11:10
Let their eyes be darkened, that they may not see, and bow down their back alway.

Hebrews 10:38
Now the just shall live by faith: but if any man draw back, my soul shall have no pleasure in him.

Hebrews 10:39
But we are not of them who draw back unto perdition; but of them that believe to the saving of the soul.

James 5:4
Behold, the hire of the labourers who have reaped down your fields, which is of you kept back by fraud, crieth: and the cries of them which have reaped are entered into the ears of the Lord of sabaoth.