By swearing, &c. These are the evils which flow from. want of the knowledge of God. Compare Hosea 4:6; Hosea 2:20. Rom 1:21. 1 John 2:3 1 John 2:4. 1 John 4:7; 1 John 4:8.
blood toucheth blood: or, murder follows murder; "blood" being put by Figure of speech Synecdoche (of Species), App-6, for bloodshed.