Cain: Adam and Eve's First Child
Adam and Eve's first child was Cain, and Eve named him confessing that she had gotten a man with Yahweh's help. The same passage records Abel's birth and marks the brothers by their work, setting the stage for the offering and murder that follow.
Abel's Wife: What Genesis 4:1–2 Says
Genesis never names a wife for Abel or describes him as married. The text gives him a brief life, an offering, and a death, and that is all.
Who Were Cain's Parents in the Bible?
Genesis 4:1–2 answers the question plainly: Cain's parents were Adam and Eve, the couple driven from the garden just before. The text also preserves Eve's own words about the birth, framing Cain's life as received with God's help.