Albert Barnes Commentary Romans 3:14

"Whose mouth is full of cursing and bitterness:" — Romans 3:14 (ASV)

Whose mouth (Psalms 10:7): The apostle has not quoted this literally, but has given the sense. David in the psalm is describing his bitter enemies.

Cursing: Reproachful and scornful language, such as Shimei used in relation to David (2 Samuel 16:5, 7, 8).

Bitterness: In the psalm, deceits. The word bitterness is used to denote severity, harshness, cruelty; reproachful and malicious words.