John 15:4-6

continue in me, and I in you. As the branch cannot bear fruit of itself unless it continues in the vine, so you cannot, unless you continue in me.

Acts 11:23

who having come and seen the grace of God rejoiced, and exhorted all to adhere to the Lord with the purpose of the heart;

Acts 27:31

Paul said to the centurion and soldiers, Unless these continue in the ship you cannot be saved.

Hebrews 3:14

for we have been made partakers of Christ, if we hold the beginning of the confidence firm to the end.

Hebrews 6:4-8

For those once enlightened and having tasted of the heavenly gift and been made partakers of the Holy Spirit,

Hebrews 9:11-12

But Christ having come, a chief priest of the good times that were to come, with a greater and a more perfect tabernacle not made with hands, that is, not of this creation,

Hebrews 9:15-17

And for this cause he is the mediator of the new covenant, that death having been for a redemption of transgressions [transgressors] under the first covenant, the called might receive the promise of the eternal inheritance.

Hebrews 10:26-30

For if we sin willingly after having received the knowledge of the truth, there is no longer a sacrifice left for sins,

Hebrews 10:39

But we are not of those who draw back to perdition, but of faith to the saving 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
continue in me, and I in you. As the branch cannot bear fruit of itself unless it continues in the vine, so you cannot, unless you continue in me.
Acts 11:23
who having come and seen the grace of God rejoiced, and exhorted all to adhere to the Lord with the purpose of the heart;
Acts 27:31
Paul said to the centurion and soldiers, Unless these continue in the ship you cannot be saved.
Hebrews 3:14
for we have been made partakers of Christ, if we hold the beginning of the confidence firm to the end.
Hebrews 6:4
For those once enlightened and having tasted of the heavenly gift and been made partakers of the Holy Spirit,
Hebrews 10:26
For if we sin willingly after having received the knowledge of the truth, there is no longer a sacrifice left for sins,

After the death

Hebrews 9:11
But Christ having come, a chief priest of the good times that were to come, with a greater and a more perfect tabernacle not made with hands, that is, not of this creation,