In 1 Samuel 14:40, the people tell Saul 'Do what seems good to you' — another expression of deferential support like the armor-bearer's 'do all that is in your heart.'

1 Samuel 10:7 tells Saul 'do whatever your hand finds to do, for God is with you' — echoed by the armor-bearer's loyalty here.

1 Samuel 26:6 records Abishai volunteering 'I will go down with you' — a loyal companion offer paralleling the armor-bearer's commitment to Jonathan.

2 Samuel 7:3 uses the same phrase 'do all that is in your heart' — Nathan's prophetic encouragement mirrors the armor-bearer's loyalty pledge.