Numbers 10:2-3
Read this passage and open each verse for the full verse feed and commentary tools.
2Make thee two trumpets of silver; of a whole piece shalt thou make them: that thou mayest use them for the calling of the assembly, and for the journeying of the camps. 3And when they shall blow with them, all the assembly shall assemble themselves to thee at the door of the tabernacle of the congregation.
Numbers 10:2-3 (KJV)