And it came to pass, when Israel dwelt in that land, that Reuben went and lay with Bilhah his father's concubine: and Israel heard it. Now the sons of Jacob were twelve: Reuben went and lay with Bilhah his father's concubine - Jonathan, in his Targum, says that Reuben only overthrew the bed of Bilhah, which was set up opposite to the bed of his mother Leah, and that this was reputed to him as if he had lain with her. The colouring given to the passage by the Targumist is, that Reuben was incensed, because he found Bilhah preferred after the death of Rachel to his own mother Leah; and therefore in his anger he overthrew her couch. The same sentiment is repeated by Jonathan, and glanced at by the Jerusalem Targum, Genesis 49:4. Could this view of the subject be proved to be correct, both piety and candour would rejoice.
And Israel heard it - Not one word is added farther in the Hebrew text; but a break is left in the verse, opposite to which there is a Masoretic note, which simply states that there is a hiatus in the verse. This hiatus the Septuagint has thus supplied: και πονηρον εφανη εναντιον αυτον, and it appeared evil in his sight.
Now the sons of Jacob were twelve - Called afterwards the twelve patriarchs, because they became heads or chiefs of numerous families or tribes, Acts 7:8; and the people that descended from them are called the twelve tribes, Acts 26:7; James 1:1. Twelve princes came from Ishmael, Genesis 25:16, who were heads of families and tribes. And in reference to the twelve patriarchs, our Lord chose twelve apostles. Strictly speaking, there were thirteen tribes among the Hebrews, as Ephraim and Manasses were counted for tribes, Genesis 48:5, Genesis 48:6; but the Scripture in naming them, says Mr. Ainsworth, usually sets down but twelve, omitting the name now of one, then of another, as may in sundry places be observed, Deuteronomy 33; Ezekiel 48; Revelation 12, etc.