Contradiction with Jeremiah 31:13
Jeremiah 31:13 speaks of turning mourning into joy and bringing comfort, whereas Jeremiah 9:19 describes mourning and the desolation of the land.
Jeremiah 31:13: Then shall the virgin rejoice in the dance, both young men and old together: for I will turn their mourning into joy, and will comfort them, and make them rejoice from their sorrow.
Contradiction with Isaiah 40:1-2
Isaiah 40:1-2 offers comfort to God's people and speaks of their iniquity being pardoned, which contradicts the mourning and wailing found in Jeremiah 9:19.
Isaiah 40:1-2: Comfort ye, comfort ye my people, saith your God.
Contradiction with Revelation 21:4
Revelation 21:4 promises that God will wipe away all tears and there will be no more mourning, contrasting with the weeping and lamentation in Jeremiah 9:19.
Revelation 21:4: And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away.
Contradiction with Psalm 30:11
Psalm 30:11 describes turning mourning into dancing, which directly contradicts the lamentation and sorrow in Jeremiah 9:19.
Psalm 30:11: Thou hast turned for me my mourning into dancing: thou hast put off my sackcloth, and girded me with gladness;
Contradiction with Isaiah 35:10
Isaiah 35:10 describes everlasting joy and no sorrow or sighing, opposing the weeping in Jeremiah 9:19.
Isaiah 35:10: And the ransomed of the LORD shall return, and come to Zion with songs and everlasting joy upon their heads: they shall obtain joy and gladness, and sorrow and sighing shall flee away.