Isaiah 38:7

And this shall be a sign unto thee from the LORD, that the LORD will do this thing that he hath spoken;
— Isaiah 38:7, King James Version

In other translations

World English Bible (WEB)

This shall be the sign to you from Yahweh, that Yahweh will do this thing that he has spoken:

American Standard Version (ASV)

And this shall be the sign unto thee from Jehovah, that Jehovah will do this thing that he hath spoken:

Young's Literal Translation (YLT)

And this <FI>is<Fi> to thee the sign from Jehovah, that Jehovah doth this thing that He hath spoken.