Set bounds unto the people - The low line of alluvial mounds at the foot of the cliff of Ras Safsafeh exactly answers to the bounds which were to keep the people off from touching the mount: but the bounds here spoken of were to be set up by Moses.
Related Commentaries of Exodus 19:12
Exodus 19:12
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: