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 References (ranked by relevance)
2 Samuel 15:30
And David went up by the ascent of mount Olivet, and wept as he went up, and had his head covered, and he went barefoot: and all the people that was with him covered every man his head, and they went up, weeping as they went up.
2 Samuel 18:33
And the king was much moved, and went up to the chamber over the gate, and wept: and as he went, thus he said, O my son Absalom, my son, my son Absalom! would God I had died for thee, O Absalom, my son, my son!