This was the Thessalians' offer. The Phocians alone of all that region would not take the Persians' side, and that for no other reason (if I argue correctly) than their hatred of the Thessalians.

Had the Thessalians aided the Greek side, then the Phocians would certainly have stood for the Persians. They replied to the offer of the Thessalians that they would give no money; they could do as the Thessalians did and take the Persian part, if for any cause they so wished, but they would not willingly betray the cause of Greece [22,39] (nation), EuropeHellas.