New Revised Standard Version
You will forget your misery; you will remember it as waters that have passed away.

Contemporary English Version
Your troubles will go away like water beneath a bridge,

New American Bible
For then you shall forget your misery, like water that has ebbed away you shall regard it.

Douay-Rheims Bible
Thou shalt also forget misery, and remember it only as waters that are passed away.

Thou shalt also forget misery, and remember it only as waters that are passed away.

Because

Genesis 41:51 And he called the name of the firstborn Manasses, saying: God hath made me to forget all my labours, and my father's house.

Proverbs 31:7 Let them drink, and forget their want, and remember their sorrow no more.

Ecclesiastes 5:20 For he shall not much remember the days of his life, because God entertaineth his heart with delight.

Isaiah 54:4 Fear not, for thou shalt not be confounded, nor blush: for thou shalt not be put to shame, because thou shalt forget the shame of thy youth, and shalt remember no more the reproach of thy widowhood.

Isaiah 65:16 In which he that is blessed upon the earth, shall be blessed in God, amen: and he that sweareth in the earth, shall swear by God, amen: because the former distresses are forgotten, and because they are hid from my eyes.

John 16:21 A woman, when she is in labour, hath sorrow, because her hour is come; but when she hath brought forth the child, she remembereth no more the anguish, for joy that a man is born into the world.

Revelation 7:14-17 And I said to him: My Lord, thou knowest. And he said to me: These are they who are come out of great tribulation and have washed their robes and have made them white in the blood of the Lamb. . . .

as waters

Job 6:15 My brethren have passed by me, as the torrent that passeth swiftly in the valleys.

Genesis 9:11 I will establish my covenant with you, and all flesh shall be no more destroyed with the waters of a flood, neither shall there be from henceforth a flood to waste the earth.

Isaiah 12:1,2 And thou shalt say in that day: I will give thanks to thee, O Lord, for thou wast angry with me: thy wrath is turned away, and thou hast comforted me. . . .

Isaiah 54:9 This thing is to me as in the days of Noe, to whom I swore, that I would no more bring in the waters of Noe upon the earth: so have I sworn not to be angry with thee, and not to rebuke thee.