John Lightfoot on John 9:28

[We are Moses' disciples.] The man, as it should seem, had in gentle and persuasive terms asked them, "Will ye also be his disciples?" as if he heartily wished they would. But they as ruggedly, "Be you so: we are Moses' disciples."

"They delivered two disciples of the wise men into the hands of the chief priest" [that they might instruct him about the rites and usages of the day of expiation]; they were of the disciples of Moses. And who are these disciples of Moses? it follows, the very phrase excludes the Sadducees.

The reader may observe, by the way, these disciples of Moses, with what reverence they treat him.

"Moses was angry about three things, and the tradition was accordingly hid from him: I. About the sabbath, Exodus 16:20: while he was angry he forgot to recite to them the traditions about the sabbath. II. About the vessels of metal, Numbers 31:14: while he was angry, he forgot to recite to them the traditions about the vessels of metal. III. About the mourner, Leviticus 10:16: while he was wrath, the tradition was hid from him, which forbade the mourner to eat of the holy things."

Did Moses think it unlawful for the mourner to have eaten of the holy things, when he spake to Eleazar and Ithamar, while they were in the very act of bewailing the death of their two brethren, "Wherefore have ye not eaten the sin offering in the holy place?" Yes, but in his passion he forgot both the tradition and himself too. Excellent disciples indeed! that can thus chastise your great master at pleasure, as a man very hasty, apt to be angry, and of a slender memory! Let him henceforward learn from you to temperate his passions and quicken his memory. You have a memory indeed that have recovered the tradition which he himself had forgot.