וַיְהִי֙ בַּפַּ֣עַם הַשְּׁבִיעִ֔ית תָּקְע֥וּ הַכֹּהֲנִ֖ים בַּשּׁוֹפָר֑וֹת וַיֹּ֨אמֶר יְהוֹשֻׁ֤עַ אֶל־הָעָם֙ הָרִ֔יעוּ כִּֽי־נָתַ֧ן יְהוָ֛ה לָכֶ֖ם אֶת־הָעִֽיר׃
And it came to pass at the seventh time, when the priests blew with the horns, that Joshua said unto the people: ‘Shout; for the LORD hath given you the city.
Read kabbalistic (mystical) interpretation of Joshua 6:16: and classical mystical sources.