'Can Testify' in the Bible

As for what he did in the land of the Jews and of Jerusalem, we can testify to that. They slew him by hanging him on a gibbet,

as the high priest and all the council of elders can testify. It was from them that I got letters to the brotherhood at Damascus, and then journeyed thither to bind those who had gathered there and bring them back to Jerusalem for punishment.

I can testify that up to their means, aye and beyond their means, they have given ??4 begging me of their own accord, most urgently, for the favour of contributing to the support of the saints.

I can testify to his exertions on your behalf and on behalf of those at Laodicea and Hierapolis.

and we have seen, we can testify, that the Father has sent the Son as the Saviour of the world.