2 Samuel 4:10

When one told me, saying, Behold, Saul is dead, thinking to have brought good tidings, I took hold of him, and slew him in Ziklag, who thought that I would have given him a reward for his tidings:

The verse belongs to the account of David receiving news of Saul's death, recounting how at Ziklag David had the Amalekite messenger put to death after the man reported Saul's death. The messenger was a wicked man who supposed he had brought good and glad tidings that would please David. He expected a reward for his tidings, believing the report of Saul's death would be welcomed as good tidings to be rewarded. David did not treat the news in that way, for his grief over Saul was genuine and no reward was given. Instead of rewarding him, David seized hold of him and slew him.

This slaying was one of the murders David repudiated as he came to the throne, showing it was done without his wish or connivance. The bringing of such tidings illustrates the sense of evangelizing as proclaiming tidings, especially glad tidings.