וַיֵּ֨דַע אָדָ֥ם עוֹד֙ אֶת־אִשְׁתּ֔וֹ וַתֵּ֣לֶד בֵּ֔ן וַתִּקְרָ֥א אֶת־שְׁמ֖וֹ שֵׁ֑ת כִּ֣י שָֽׁת־לִ֤י אֱלֹהִים֙ זֶ֣רַע אַחֵ֔ר תַּ֣חַת הֶ֔בֶל כִּ֥י הֲרָג֖וֹ קָֽיִן׃
Adam wohnte abermals seinem Weibe bei, sie gebar einen Sohn und nannte ihn Seth (Scheth): Denn, so sprach sie, Gott hat mir einen andern Sproß bescheert an Stelle Abels, den Kain erschlagen.
Rashi on Genesis
וידע אדם AND ADAM KNEW — Lamech came to Adam Harishon, complaining about his wives. He (Adam) said to them: “Is it for you to be overparticular regarding God’s decrees? You do your duty, and He will do His!” They replied to him: “First correct yourself: have you not lived apart from your wife these 130 years, ever since, through you, death was decreed as a punishment?” At once ‘וידע אדם עוד וגו “Adam knew his wife עוד ” — What signifies the word עוד? It is used here to teach that his love for her was now greater than before (Genesis Rabbah 23:4-5).
Radak on Genesis
וידע אדם עוד את אשתו, this occurred 130 years later than the last time, as is evident from 5,3. During the intervening years Adam had not sired any children because Chavah had been the cause of his being punished. He had kept his distance from her during all these years.