Reference for I Samuel 17:57

וּכְשׁ֣וּב דָּוִ֗ד מֵֽהַכּוֹת֙ אֶת־הַפְּלִשְׁתִּ֔י וַיִּקַּ֤ח אֹתוֹ֙ אַבְנֵ֔ר וַיְבִאֵ֖הוּ לִפְנֵ֣י שָׁא֑וּל וְרֹ֥אשׁ הַפְּלִשְׁתִּ֖י בְּיָדֽוֹ׃

And as David returned from the slaughter of the Philistine, Abner took him, and brought him before Saul with the head of the Philistine in his hand.

BDB