Genesis 4:8

Let us go forth abroad. These words are now wanting in the Hebrew; being omitted, according to Kennicott, since the days of Aquila 130; they are found in the Samaritan copy and version, in the Septuagint, &c. (Haydock) --- The Masorets place a mark, as if something were defective here, and in 27 other verses, or in 25 at least. (Haydock) --- Abel's violent death was a figure of that of Jesus Christ, inflicted for the like cause. See Hebrews xii. 2. (Calmet) --- In consequence of these crimes, Cain separated from the Church, and the Jews became no longer God's people: both Cain and the Jews became vagabonds. (Haydock) --- The Targum of Jerusalem observes, that Cain talked against God's providence and the future world, which Abel hearing with marked indignation, Cain took occasion to kill him. (Worthington)