Mark 9:19

He answereth him
The father of the child, and who is included in the reproof afterwards given, for his unbelief, and taking part with the Scribes against his disciples; though the Vulgate Latin, Arabic, Persic, and Ethiopic versions, read, "them"; meaning not his disciples, but the Scribes and Pharisees, with the father of the child: and saith,

O faithless generation, how long shall I be with you? how long shall
I suffer you? bring him unto me; (See Gill on Matthew 17:17).