Leviticus 15:24

²⁴If a man is coupled fleshly with her in the time of blood that cometh, or runneth, from her by (the) months, he shall be unclean by seven days, and each bed in which he sleepeth shall be unclean. (If a man is fleshly coupled with her at the time of blood that runneth out from her by the month, he shall be unclean for seven days, and each bed in which he sleepeth shall be unclean.)