כִּ֣י בֶאֱמוּנָ֞ה הֵ֗מָּה אַרְבַּ֙עַת֙ גִּבֹּרֵ֣י הַשֹּׁעֲרִ֔ים הֵ֖ם הַלְוִיִּ֑ם וְהָיוּ֙ עַל־הַלְּשָׁכ֔וֹת וְעַ֥ל הָאֹצְר֖וֹת בֵּ֥ית הָאֱלֹהִֽים׃
for the four chief porters were in a set office. These were the Levites. They were also over the chambers and over the treasuries in the house of God.
Read halakhic rulings (Jewish law) on I Chronicles 9:26: and classical halakhic sources.