Joshua 6:4

4Seven priests shall bear seven atrumpets of brams’ horns before the ark. On the seventh day you shall march around the city seven times, and cthe priests shall blow the trumpets.

Joshua 6:15-16

15On the seventh day they rose early, at the dawn of day, and marched around the city in the same manner seven times. It was only on that day that they marched around the city seven times. 16And at the seventh time, when the priests had blown the trumpets, Joshua said to the people, “Shout, for the Lord has given you the city.

2 Kings 5:10

10And Elisha sent a messenger to him, saying, dGo and wash in the Jordan seven times, and your flesh shall be restored, and you shall be clean.”
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