In 1 Samuel 28:1, Achish acts on his belief from 27:12, telling David he must go to battle with him — a direct narrative consequence.

In 1 Samuel 13:4, Israel is abominated by the Philistines, parallel to David being abhorred by Israel in 27:12 — same concept of being odious.

Exodus 5:21 uses the same phrase 'made our savour to be abhorred' — a direct verbal parallel to Achish's claim that David made Israel abhor him.

Exodus 21:6 describes a servant who chooses to serve his master forever — the exact phrase 'serve him for ever' used of David in 27:12.

In Genesis 34:30, Jacob laments being made odious by his sons — the same language of becoming abhorred used in 27:12.

In 2 Samuel 10:6, the Ammonites 'stank before David' — the same idiom of being odious as in 27:12 where David is abhorred by Israel.