Leviticus 15:18-20

Young's Literal Translation

¹⁸ `And a woman with whom a man lieth with seed of copulation, they also have bathed with water, and been unclean till the evening.

¹⁹ `And when a woman hath an issue -- blood is her issue in her flesh -- seven days she is in her separation, and any one who is coming against her is unclean till the evening.

²⁰ `And anything on which she lieth in her separation is unclean, and anything on which she sitteth is unclean;