Therefore; or, assuredly, as the word signifies, Jer_2:32, Jer_5:2, Zec_11:17; that thou mayst see how I hate murder, and how impartially I shall punish all murderers; and that thou mayst be unhappily free from this fear, that thou mayst live for an example to mankind, for a terror to thyself and others.
Sevenfold, i.e. abundantly; he shall be plagued with many and grievous punishments, as the phrase is used, Lev_26:28Psa_12:7, Psa_79:12, and in many other places.
A mark upon Cain. What this was, whether a trembling of his body, or a ghastliness of his countenance, or what other visible token of the Divine displeasure, God hath not revealed, nor doth it concern us to know.