Bible/King James/Documentary Hypothesis/Jahwist source/Song of Lamech

According to the documentary hypothesis, the Torah is composed from a number of originally independent sources joined by a redactor. One of these supposed sources is named the "Jahwist source", due to its preference of referring to God as Jahweh (usually translated as "The LORD"). This source contains within it two poems which are believed to have originally been separate documents. One of these poems (Gen 4:23-24) is known as the Song of Lamech.

Although the text is ordered as it appears in the bible, the numbering does not reflect, in any way, the original numbering of the text, and simply exists for the ease of modern readership

Text of the Song of Lamech
1Adah and Zillah, Hear my voice; ye wives of Lamech, hearken unto my speech: for I have slain a man to my wounding, and a young man to my hurt.

2If Cain shall be avenged sevenfold, truly Lamech seventy and sevenfold.