וַיֹּ֙אמֶר֙ אֶל־הָעָ֔ם הֱי֥וּ נְכֹנִ֖ים לִשְׁלֹ֣שֶׁת יָמִ֑ים אַֽל־תִּגְּשׁ֖וּ אֶל־אִשָּֽׁה׃
Y dijo al pueblo: Estad apercibidos para el tercer día; no lleguéis á mujer.
Mishnah Mikvaot
If he emitted thick drops from his member, he is unclean, the words of Rabbi Elazar Hisma. If one had sexual dreams in the night and arose and found his flesh heated, he is unclean. If a woman discharged semen on the third day, she is clean, the words of Rabbi Elazar ben Azariah. Rabbi Ishmael says: sometimes there are four time periods, and sometimes five, and sometimes six. Rabbi Akiva says: there are always five.