In Matthew 10:24, the identical saying appears: a disciple is not above his teacher—a direct parallel of Luke 6:40.

Matthew 10:25 expands the same principle: the disciple should be like his teacher, then applies it to persecution.

Matthew 23:15 shows Pharisees making converts twice the children of hell—illustrating a bad teacher producing worse disciples.

John 13:16 says no servant is greater than his master—the same truth that a disciple is not above his teacher.

John 15:20 repeats the same principle and adds that persecution of the master implies persecution of the disciple.