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."
Cross References (ranked by relevance)
Philippians 3:13
86
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
66
Now the just shall live by faith: but if any man draw back, my soul shall have no pleasure in him.
2 Timothy 4:10
18
For Demas hath forsaken me, having loved this present world, and is departed unto Thessalonica; Crescens to Galatia, Titus unto Dalmatia.