A.T. Robertson Commentary Luke 24:25

"And he said unto them, O foolish men, and slow of heart to believe in all that the prophets have spoken!" — Luke 24:25 (ASV)

Foolish men (ανοητο). Literally without sense (νους), not understanding. Common word.

Slow of heart (βραδεις τη καρδια). Slow in heart (locative case). Old word for one dull, slow to comprehend or to act.

All that (πασιν οις). Relative attracted from the accusative α to the case of the antecedent πασιν (dative). They could only understand part of the prophecies, not all.