וַיִּקְרָ֞א יְהוֹשֻׁ֤עַ בִּן־נוּן֙ אֶל־הַכֹּ֣הֲנִ֔ים וַיֹּ֣אמֶר אֲלֵהֶ֔ם שְׂא֖וּ אֶת־אֲר֣וֹן הַבְּרִ֑ית וְשִׁבְעָ֣ה כֹֽהֲנִ֗ים יִשְׂאוּ֙ שִׁבְעָ֤ה שֽׁוֹפְרוֹת֙ יוֹבְלִ֔ים לִפְנֵ֖י אֲר֥וֹן יְהוָֽה׃
And Joshua the son of Nun called the priests, and said unto them: ‘Take up the ark of the covenant, and let seven priests bear seven rams’horns before the ark of the LORD.’
Read halakhic rulings (Jewish law) on Joshua 6:6: and classical halakhic sources.