Contradiction with 2 Corinthians 7:9-10
This verse speaks of godly sorrow leading to repentance and salvation, whereas 2 Samuel 15:30 describes David weeping as he flees, showing a different context and purpose for sorrow.
2 Corinthians 7:9-10: Now I rejoice, not that ye were made sorry, but that ye sorrowed to repentance: for ye were made sorry after a godly manner, that ye might receive damage by us in nothing. [after...: or, according to God]
Contradiction with Philippians 4:4
This verse encourages believers to "Rejoice in the Lord always," which contradicts the sorrow and mourning depicted in 2 Samuel 15:30 where David and the people with him ascend the Mount of Olives weeping.
Philippians 4:4: Rejoice in the Lord alway: [and] again I say, Rejoice.
Contradiction with Proverbs 17:22
It states a "merry heart doeth good like a medicine," which contrasts with the sorrow and mourning atmosphere presented in 2 Samuel 15:30.
Proverbs 17:22: A merry heart doeth good [like] a medicine: but a broken spirit drieth the bones. [like: or, to]
Contradiction with Isaiah 61:3
This verse talks about replacing mourning with joy and praise, which contradicts the depiction of David ascending the Mount of Olives in mourning and weeping in 2 Samuel 15:30.
Isaiah 61:3: To appoint unto them that mourn in Zion, to give unto them beauty for ashes, the oil of joy for mourning, the garment of praise for the spirit of heaviness; that they might be called trees of righteousness, the planting of the LORD, that he might be glorified.