The disciples' worry about bread:
Related Commentaries of Mark 8:14
Mark 8:14-16
14 Now the disciples had forgotten to take bread, neither had they in the ship with them more than one loaf.
15 And he charged them, saying,Take heed, beware of the leaven of the Pharisees, and of the leaven of Herod.
16 And they reasoned among themselves, saying, It is because we have no bread.