Original Verse:
Romans Chapter 3 Verse 14"whose mouth is full of cursing and bitterness."

Reference Verses:
Psalms Chapter 10 Verse 7His mouth is full of cursing, deceit, and oppression. Under his tongue is mischief and iniquity.
Psalms Chapter 59 Verse 12For the sin of their mouth, and the words of their lips, let them be caught in their pride, for the curses and lies which they utter.
Psalms Chapter 109 Verse 17Yes, he loved cursing, and it came to him. He didn't delight in blessing, and it was far from him.
Psalms Chapter 109 Verse 18He clothed himself also with cursing as with his garment. It came into his inward parts like water, like oil into his bones.
James Chapter 3 Verse 10Out of the same mouth comes forth blessing and cursing. My brothers, these things ought not to be so.