John 15:4-6

Abide in me, and I in you. As the branch is not able to produce fruit of itself, unless it may abide in the vine; so you are not able, unless you may abide in me.

Acts 11:23

Who, coming, and seeing the grace of God, rejoiced, and continued to exhort all, with purpose of heart to abide with the Lord:

Acts 27:31

Paul said to the centurion and the soldiers, Unless these may remain in the ship, you are not able to be saved.

Hebrews 3:14

for we have been made partakers of Christ, if indeed we may hold fast the beginning of confidence firm unto the end.

Hebrews 6:4-8

For it is impossible that those having been once enlightened, and tasted the heavenly gift, and have been made partakers of the Holy Ghost,

Hebrews 9:11-12

But Christ being a high priest of good things to come, through a greater and a more perfect tabernacle, not made with hands, that is, not of this world;

Hebrews 9:15-17

And on this account he is mediator of the new covenant, since there being death, unto the redemption of the transgressions unto the first covenant, those having been called may receive the promise of eternal inheritance.

Hebrews 10:26-30

For we sinning willingly after we have received the perfect knowledge of the truth, there is left no more sacrifice for sins,

Hebrews 10:39

But we are not of the drawing back unto perdition; but of faith unto the salvation of the soul.

Treasury of Scripture Knowledge

Summary

Because he should have remained in the city of his refuge until the death of the high priest: but after the death of the high priest the slayer shall return into the land of his possession.

After the death

Bible References

He should

John 15:4
Abide in me, and I in you. As the branch is not able to produce fruit of itself, unless it may abide in the vine; so you are not able, unless you may abide in me.
Acts 11:23
Who, coming, and seeing the grace of God, rejoiced, and continued to exhort all, with purpose of heart to abide with the Lord:
Acts 27:31
Paul said to the centurion and the soldiers, Unless these may remain in the ship, you are not able to be saved.
Hebrews 3:14
for we have been made partakers of Christ, if indeed we may hold fast the beginning of confidence firm unto the end.
Hebrews 6:4
For it is impossible that those having been once enlightened, and tasted the heavenly gift, and have been made partakers of the Holy Ghost,
Hebrews 10:26
For we sinning willingly after we have received the perfect knowledge of the truth, there is left no more sacrifice for sins,

After the death

Hebrews 9:11
But Christ being a high priest of good things to come, through a greater and a more perfect tabernacle, not made with hands, that is, not of this world;