There was none of you that convinced Job - There was no one to produce conviction on his mind, or rather, there was no one to reprove him by answering him - ענה מוכיח môkiyach ‛ânâh. They were completely silenced: and had nothing to reply to the arguments which he had advanced, and to his reflections on the divine government.

Yea, I attended unto you - Instead of ועדיכם veadeychem, and unto you, one MS. reads the above letters with points that cause it to signify and your testimonies; which is the reading of the Syriac, Arabic, and Septuagint.
Behold, there was none of you that convinced Job - Confuted Job. They spoke multitudes of words, but were unable to overthrow his arguments.

Yea, I attended unto you,.... Very closely, with great application and diligence, endeavouring to get, as it were, within them, and thoroughly understand the meaning of what they said:
and, behold, there was none of you that convinced Job; which was not owing to his obstinacy, but to want of proof in them, their words and arguments; they had charged Job highly, as particularly Eliphaz, Job 22:5; but then they failed in their proof; they produced nothing to support their allegations:
or that answered his words; the arguments and reasons he gave in proof of his own innocence and uprightness, or the instances he produced, showing that God often afflicted good men, and suffered the wicked to prosper; and therefore no argument could be drawn from God's dealings with men, proving they were either of this or the other character, good or bad men.

Convinced - By solid and satisfactory answers.