'Witnessing' in the Bible

To whom am I to give word, witnessing so that they may take note? see, their ears are stopped, and they are not able to give attention: see, the word of the Lord has been a cause of shame to them, they have no delight in it.

For I gave certain witness to your fathers on the day when I took them up out of the land of Egypt, and even to this day, getting up early and witnessing and saying, Give ear to my voice.

So I took the paper witnessing the business, one copy rolled up and stamped, and one copy open:

And the night after, the Lord came to his side and said, Be of good heart, for as you have been witnessing for me in Jerusalem, so will you be my witness in Rome.

And so, by God's help, I am here today, witnessing to small and great, saying nothing but what the prophets and Moses said would come about;

The Holy Spirit witnessing by this that the way into the holy place had not at that time been made open, while the first Tent was still in being;

I have sent you this short letter by Silvanus, a true brother, in my opinion; comforting you and witnessing that this is the true grace of God; keep to it.

(And the life was made clear to us, and we have seen it and are witnessing to it and giving you word of that eternal life which was with the Father and was seen by us);