Berean Study Bible
Whoever accepts His testimony has certified that God is truthful.

King James Bible
He that hath received his testimony hath set to his seal that God is true.

American Standard Version
He that hath received his witness hath set his seal to this , that God is true.

Darby Bible Translation
He that has received his testimony has set to his seal that God is true;

Douay-Rheims Bible
He that hath received his testimony, hath set to his seal that God is true.

English Revised Version
He that hath received his witness hath set his seal to this, that God is true.

Young's Literal Translation
he who is receiving his testimony did seal that God is true;