וַיָּ֣רָץ דָּ֠וִד וַיַּעֲמֹ֨ד אֶל־הַפְּלִשְׁתִּ֜י וַיִּקַּ֣ח אֶת־חַ֠רְבּוֹ וַֽיִּשְׁלְפָ֤הּ מִתַּעְרָהּ֙ וַיְמֹ֣תְתֵ֔הוּ וַיִּכְרָת־בָּ֖הּ אֶת־רֹאשׁ֑וֹ וַיִּרְא֧וּ הַפְּלִשְׁתִּ֛ים כִּֽי־מֵ֥ת גִּבּוֹרָ֖ם וַיָּנֻֽסוּ׃
E Davide corse, si fermò sopra il Filisteo, prese la sua spada, la sguainò dal fodero, lo finì e con essa gli tagliò la testa. E quando i Filistei videro che il loro eroe era morto, fuggirono.
Radak
When my enemies turn back, They stumble and perish at Thy presence. – For all the Philistine armies fled and turned back, as it is written (1 Sam. 17:51): “And when the Philistines saw that their champion was dead they fled.”
Rashi
Elchonon. Dovid.24We know that it was Dovid who killed Golias in Shmuel I, 17:51, consequently this Elchonon must be Dovid.