Genesis 4:18 (BSB)

Now to Enoch was born Irad, and Irad was the father of Mehujael, and Mehujael was the father of Methusael, and Methusael was the father of Lamech.

From Genesis 4. Also in the ESV.

Commentary on Genesis 4:18

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Genesis 4:16-18: We have here a further account of Cain, and what became of him after he was rejected of God. I. He tamely submitted to that part of his sentence by which he was hidden from God's face; for (Gen 4:16) he went out from the presence of the Lord, that is, he willingly renounced God and religion, and was content to forego its privileges, so...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Genesis 4:18: And Lamech took unto him two wives,.... He was the first we read of that introduced polygamy, contrary to the first institution of marriage, whereby only one man and one woman were to be joined together, and become one flesh, Gen 2:24.
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Genesis 4:16-24: Gen 4:16-24 The family of the Cainites. - Gen 4:16. The geographical situation of the land of Nod, in the front of Eden (קדמת, see Gen 2:14), where Cain settled after his departure from the place or the land of the revealed presence of God (cf. Jon 1:3), cannot be determined.