Revelation 21:4

And God shall wipe away every tear from their eyes, and death shall be no more; nor shall mourning, nor crying, nor toil be any more: because 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 shall dwell among 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 shall dwell among them.
Revelation 21:4
And God shall wipe away every tear from their eyes, and death shall be no more; nor shall mourning, nor crying, nor toil be any more: because the former things are passed away.

General references

1 Corinthians 13:10
But when that which is perfect cometh, then that which is in part shall be done away.