John 16:21

A woman, when she is in labour, has sorrow, because her time has come. But when she has given birth to the babe, she no longer remembers the pain, because of her joy at a child being born into the world.

Revelation 7:14-17

"My lord, you know," I replied. "They are those," he said, "who have just passed through the great distress, and have washed their robes and made them white in the blood of the Lamb.

Treasury of Scripture Knowledge

Summary

Because thou shalt forget thy misery, and remember it as waters that pass away:

Bible References

Because

John 16:21
A woman, when she is in labour, has sorrow, because her time has come. But when she has given birth to the babe, she no longer remembers the pain, because of her joy at a child being born into the world.
Revelation 7:14
"My lord, you know," I replied. "They are those," he said, "who have just passed through the great distress, and have washed their robes and made them white in the blood of the Lamb.