GOD'S WORD® Translation
I didn't know who he was. However, I came to baptize with water to show him to the people of Israel."

American Standard Version
And I knew him not; but that he should be made manifest to Israel, for this cause came I baptizing in water.

Berean Study Bible
I myself did not know Him, but the reason I came baptizing with water was that He might be revealed to Israel.”

Douay-Rheims Bible
And I knew him not, but that he may be made manifest in Israel, therefore am I come baptizing with water.

English Revised Version
And I knew him not; but that he should be made manifest to Israel, for this cause came I baptizing with water.

King James Bible
And I knew him not: but that he should be made manifest to Israel, therefore am I come baptizing with water.

World English Bible
I didn't know him, but for this reason I came baptizing in water: that he would be revealed to Israel."

Young's Literal Translation
and I knew him not, but, that he might be manifested to Israel, because of this I came with the water baptizing.

John 1:31 Additional Translations ...