King James Version (KJV)
Of Zebulun, such as went forth to battle, expert in war, with all instruments of war, fifty thousand, which could keep rank: they were not of double heart.
Modern English
Of Zebulun, 50,000 seasoned troops, equipped for battle with all the weapons of war, to help David with singleness of purpose.
Hebrew
מִ֠זְּבוּלֻן יוֹצְאֵ֨י צָבָ֤א עֹרְכֵי֙ מִלְחָמָ֔ה בְּכָל כְּלֵ֥י מִלְחָמָ֖ה חֲמִשִּׁ֣ים אֶ֑לֶף וְלַעְדֹּ֥ר בְּלֹ֖א לֵ֥ב וָלֵֽב׃
mizbvlun yvoṣʾey ṣabaʾ ʿorkey milḥamah bkal kley milḥamah ḥamishiym ʾelef vlaʿdor bloʾ leb valeb