Use "vouched" in a sentence

1. He vouched his words by his deeds.

2. He vouched that she was really with him at the time.

3. 18, 19. (a) When Barnabas vouched for Saul, what was the effect?

4. Deceived by unscrupulous men, he vouched for the authenticity of that wretched diamond mine.

5. Argot also vouched for Deet's honesty about a talking tree, advising her parents to allow her to depart, fight the Darkening, and warn All-Maudra Mayrin