'En dorsed' in the Bible

while they went out and preached everywhere, the Lord working with them and confirming the word by the miracles that endorsed it. (b) But they gave Peter and his companions a brief account of all these injunctions. And, after that, Jesus himself sent out by means of them from east to west the sacred and imperishable message of eternal salvation.

So they were endorsed and sent on by the church, and as they passed through Phoenicia and Samaria, they told of the conversion of the heathen and brought great rejoicing to all the brothers.

[and besides this evidence] God also testifying with them [confirming the message of salvation], both by signs and wonders and by various miracles [carried out by Jesus and the apostles] and by [granting to believers the] gifts of the Holy Spirit according to His own will.

These [false teachers] are part of the world, so [naturally] they speak [a message endorsed] by the world and the world listens to them.