Now when he was in Jerusalem at the Passover, during the feast, many believed in his name, observing his signs which he did.

Many believed in him there.

Therefore many of the Jews, who came to Mary and saw what Jesus did, believed in him.

because on account of him many of the Jews went away and believed in Jesus.

They, when they heard it, glorified God. They said to him, "You see, brother, how many thousands there are among the Jews of those who have believed, and they are all zealous for the law.