Revelation 21:4

and God will wipe away every tear from their eyes, and death shall be no more, neither shall mourning, nor crying, nor pain he any more; for the former things are passed away.

Revelation 7:15-17

Therefore are they before the throne of God, and serve him day and night in his temple; and he that sitteth on the throne will make his abode with them.

Treasury of Scripture Knowledge

Summary

Thy sun shall no more go down; neither shall thy moon withdraw itself: for the LORD shall be thine everlasting light, and the days of thy mourning shall be ended.

General references

Bible References

The days

Revelation 7:15
Therefore are they before the throne of God, and serve him day and night in his temple; and he that sitteth on the throne will make his abode with them.
Revelation 21:4
and God will wipe away every tear from their eyes, and death shall be no more, neither shall mourning, nor crying, nor pain he any more; for the former things are passed away.

General references

1 Corinthians 13:10
but when that which is perfect is come, that which is in part will be done away.