John the Apostle
John 6:67BSB·traditional attribution

So Jesus asked the Twelve, “Do you want to leave too?”

John Calvin Reformed @genevareformer

67. Jesus therefore said to the twelve. As the faith of the apostles might be greatly shaken, when they saw that they were so small a remnant of a great multitude, Christ directs his discourse to them, and shows that there is no reason why they should allow themselves to be hurried away by the lightness and unsteadiness of others.

Matthew Henry Presbyterian @wholebiblehenry

We have here an account of the effects of Christ's discourse. Some were offended and others edified by it; some driven from him and others brought nearer to him. I. To some it was a savour of death unto death; not only to the Jews, who were professed enemies to him and his doctrine, but even to many of his disciples, such as were disciples...

Commenting on John 6:60-71

John Gill Reformed Baptist @doctorgill

And we believe and are sure,.... Or know of a certainty: they believed upon the first call of them by Christ, and their following of him, that he was the true Messiah; and they came to an assurance of it, by the miracles he wrought, and by the doctrines which he taught; their faith, how weak soever it might be at first, rose up to...