Strong H1379 גָּבַל gâbal · to border

Exodus

1. Exodus 19:12
   And thou shalt set bounds unto the people round about, saying, Take heed to yourselves, that ye go not up into the mount, or touch the border of it: whosoever toucheth the mount shall be surely put to death:
2. Exodus 19:23
   And Moses said unto the Lord, The people cannot come up to mount Sinai: for thou chargedst us, saying, Set bounds about the mount, and sanctify it.