2 Samuel 20:5
So Amasa went to assemble the men of Judah: but he tarried longer than the set time which he had appointed him.
Cross-reference
2 Samuel 20:8
Historical context
In 2 Samuel 20:8, Joab kills Amasa; his delay allowed Joab to intercept him, driving the narrative.
2 Samuel 19:13
Contrast
In 2 Samuel 19:13, David appoints Amasa commander; his delay here shows he fails that trust.