A.T. Robertson Commentary Matthew 16:7

"And they reasoned among themselves, saying, We took no bread." — Matthew 16:7 (ASV)

They reasoned (διελογιζοντο). It was pathetic, the almost jejune inability of the disciples to understand the parabolic warning against "the leaven of the Pharisees and Sadducees" (verse 6) after the collision of Christ just before with both parties in Magadan. They kept it up, imperfect tense. It is "loaves" (αρτους) rather than "bread."