Philippians 3:13

Brethren, I count not myself to have apprehended: but {this} one thing {I do}, forgetting those things which are behind, and reaching forth unto those things which are before,

Hebrews 10:38

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

2 Peter 2:20-22

For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning.

Luke 17:31-32

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.

James 1:6-8

But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.

Psalms 78:8-9

And might not be as their fathers, a stubborn and rebellious generation; a generation {that} set not their heart aright, and whose spirit was not stedfast with God. {that...: Heb. that prepared not their heart}

2 Timothy 4:10

For Demas hath forsaken me, having loved this present world, and is departed unto Thessalonica; Crescens to Galatia, Titus unto Dalmatia.

Acts 15:37-38

And Barnabas determined to take with them John, whose surname was Mark.