'Testified' in the Bible

So [when] they had solemnly testified and spoken the word of the Lord, they turned back toward Jerusalem, and were proclaiming the good news [to] many villages of the Samaritans.

So they stayed [there] for a considerable time, speaking boldly for the Lord, who testified to the message of his grace, granting signs and wonders to be performed through their hands.

And God, who knows the heart, testified to them [by] giving [them] the Holy Spirit, just as he also [did] to us.

And the next night the Lord stood by him [and] said, "Have courage, for as you have testified about me in Jerusalem, so you must also testify in Rome."