וְהָ֣אָדָ֔ם יָדַ֖ע אֶת־חַוָּ֣ה אִשְׁתּ֑וֹ וַתַּ֙הַר֙ וַתֵּ֣לֶד אֶת־קַ֔יִן וַתֹּ֕אמֶר קָנִ֥יתִי אִ֖ישׁ אֶת־יְהוָֽה׃
And the man knew Eve his wife; and she conceived and bore Cain, and said: ‘I have agotten a man with the help of the LORD.’
Read halakhic rulings (Jewish law) on Genesis 4:1: and classical halakhic sources.