New Defender's Study Bible Notes
58:3 as soon as they be born. Infants naturally begin “speaking lies” and acting deceptively essentially as soon as they are born, for this is our inborn sin-nature, ever since Adam and Eve. It takes the new birth to give a person a true love and respect for the laws and character of God (Colossians 3:9-10).
58:4 deaf adder. This is believed to be the very poisonous Egyptian cobra.
58:6 in their mouth. This is one of the most graphic imprecations in the imprecatory psalms. See note on Psalm 5.
58:8 snail which melteth. This seems to be a reference to the slimy substance secreted by Palestinian snails as they crawl along the ground, thus apparently melting away, eventually leaving empty shells.
Psalm 59 (title). The reference in the title is probably to I Samuel 19:11, when Saul sent “messengers” to kill David in his own home and he was able to escape with the help of Michal, his wife. This is considered to be another (like Psalm 58) of the imprecatory psalms.