Exodus 19:15

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

Exodus 19:15 In-Context

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.'
16 And it cometh to pass, on the third day, while it is morning, that there are voices, and lightnings, and a heavy cloud, on the mount, and the sound of a trumpet very strong; and all the people who [are] in the camp do tremble.
17 And Moses bringeth out the people to meet God from the camp, and they station themselves at the lower part of the mount,
Young's Literal Translation is in the public domain.