John Mark
Mark 9:14ESV·traditional attribution

And when they came to the disciples, they saw a great crowd around them, and scribes arguing with them.

John Calvin Reformed @genevareformer

As Mark is more full, and explains the circumstances very minutely, we shall follow the order of his narrative. And first he points out clearly the reason why Christ uses a harshness so unusual with him, when he exclaims that the Jews, on account of their perverse malice, do not deserve to be any longer endured.

Matthew Henry Presbyterian @wholebiblehenry

We have here the story of Christ casting the devil out of a child, somewhat more fully related than it was in Mat 17:14, etc. Observe here, I. Christ's return to his disciples, and the perplexity he found them in. He laid aside his robes of glory, and came to look after his family, and to enquire what was become of them.

Commenting on Mark 9:14-29

John Gill Reformed Baptist @doctorgill

And when he came to his disciples,.... The other nine, who were left at the bottom of the mountain, and were waiting for him: he saw a great multitude about them: there was a multitude that followed him from Bethsaida hither; and which, very likely, was greatly increased upon Christ's arrival in those parts, and the people hearing of it; and the Scribes questioning with...