'Bearing Witness' in the Bible

And having removed him he raised up to them David for king, of whom also bearing witness he said, I have found David, the son of Jesse, a man after my heart, who shall do all my will.

who shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts accusing or else excusing themselves between themselves;)

I say the truth in Christ, I lie not, my conscience bearing witness with me in the Holy Spirit,