I Chronicles 9:25 Halakhah

וַאֲחֵיהֶ֨ם בְּחַצְרֵיהֶ֜ם לָב֨וֹא לְשִׁבְעַ֧ת הַיָּמִ֛ים מֵעֵ֥ת אֶל־עֵ֖ת עִם־אֵֽלֶּה׃

And their brethren, in their villages, were to come in every seven days from time to time to be with them;