Mark 6:9

But be shod with sandals; and not put on two coats.

Cross-reference

Luke 9:3 Contrast

Luke 9:3 prohibits sandals, opposite to Mark's command to wear them.

Luke 10:4 Contrast

Luke 10:4 forbids sandals, directly contrasting Mark's permission.

Luke 22:35 Contrast

Luke 22:35 recalls being sent without sandals, contradicting Mark's instruction to wear them.