Have seven priests carry seven rams’ horns in front of the ark. Then on the seventh day, march around the city seven times, while the priests blow the horns.
KJV
And seven priests shall bear before the ark seven trumpets of rams’ horns: and the seventh day ye shall compass the city seven times, and the priests shall blow with the trumpets.
ASV
And seven priests shall bear seven trumpets of rams’ horns before the ark: and the seventh day ye shall compass the city seven times, and the priests shall blow the trumpets.