Hebrews 10:39

But we are not of those who turn back unto perdition; but of those who believe to the salvation of the soul.

Luke 17:31-32

In that day, let not the man who is upon the roof, and his goods in the house, go down to carry them away: and he that is in the field, in like manner, let him not return for any things behind him.

Acts 15:38

But Paul did not think him a fit person to take with them, who had withdrawn from them from Pamphylia, and no longer went with them to the service.

2 Timothy 4:10

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

Treasury of Scripture Knowledge

Summary

Because they turned back from him, and would not consider any of his ways:

Bible References

Turned

Luke 17:31
In that day, let not the man who is upon the roof, and his goods in the house, go down to carry them away: and he that is in the field, in like manner, let him not return for any things behind him.
Acts 15:38
But Paul did not think him a fit person to take with them, who had withdrawn from them from Pamphylia, and no longer went with them to the service.
2 Timothy 4:10
for Demas hath forsaken me, having loved this present world, and is gone unto Thessalonica; Crescens to Galatia; Titus to Dalmatia.
Hebrews 10:39
But we are not of those who turn back unto perdition; but of those who believe to the salvation of the soul.