What is the textual evidence for defining “μισέω” as “reject”?

Since love is the putting of others first. Not loving, or hate means simply to put them not first. Even going as far as rejection is not required. With Jacob and Esau. The first was made last and the last made first. Esau was only second.

In the law of the flying axe head:

   Deut 19.5 As when a man goeth into the wood with his neighbour to hew wood, and his hand fetcheth a stroke with the axe to cut down the tree, and the head slippeth from the helve, and lighteth upon his neighbour, that he die; he shall flee unto one of those cities, and live: 6 Lest the avenger of the blood pursue the slayer, while his heart is hot, and overtake him, because the way is long, and slay him; whereas he was not worthy of death, inasmuch as he hated him not in time past.

The accidental killing is considered an implied act of hate, because the wielder did not love the victim enough to consider his safety first. 'In the past' implies that he hated him now.