Exodus 19:13-15

Young's Literal Translation

¹³ a hand cometh not against him, for he is certainly stoned or shot through, whether beast or man it liveth not; in the drawing out of the jubilee cornet they go up into the mount.'

¹⁴ And Moses cometh down from the mount unto the people, and sanctifieth the people, and they wash their garments;

¹⁵ and he saith unto the people, `Be ye prepared for the third day, come not nigh unto a woman.'