Contradiction with Proverbs 3:5
Trust in God's wisdom rather than relying on human understanding, while Jeremiah 49:20 speaks of God's sovereign plan and intent to bring calamity upon Edom.
Proverbs 3:5: Trust in the LORD with all thine heart; and lean not unto thine own understanding.
Contradiction with Jeremiah 29:11
Speaks of God having plans to prosper and not to harm, which contrasts with Jeremiah 49:20's message about God's plan to bring disaster.
Jeremiah 29:11: For I know the thoughts that I think toward you, saith the LORD, thoughts of peace, and not of evil, to give you an expected end. [expected...: Heb. end and expectation]