Mark 8:16

8:16 So they began to discuss with one another about having no bread.

Mark 8:32

8:32 He spoke openly about this. So Peter took him aside and began to rebuke him.

Mark 10:28

10:28 Peter began to speak to him, “Look, we have left everything to follow you!”

Mark 13:5

13:5 Jesus began to say to them, “Watch out that no one misleads you.