2 Samuel 19:4

But the king covered his face, and the king cried with a loud voice, O my son Absalom, O Absalom, my son, my son!

Cross-reference

In 2 Samuel 15:30, David also covers his head and weeps while fleeing Absalom — the same grief gesture now repeated in mourning.

In 2 Samuel 18:33, David utters the identical lament 'O my son Absalom' — this verse echoes that cry.

In 2 Samuel 14:1, Joab sees David's heart toward Absalom — here that same love is expressed in grief.