John Mark
Mark 6:40ESV·traditional attribution

So they sat down in groups, by hundreds and by fifties.

Matthew Henry Presbyterian @wholebiblehenry

In there verses, we have, I. The return to Christ of the apostles whom he had sent forth (Mar 6:7), to preach, and work miracles. They had dispersed themselves into several quarters of the country for some time, but when they had made good their several appointments, by consent they gathered themselves together, to compare notes, and came to Jesus, the centre of their unity...

Commenting on Mark 6:30-44

John Gill Reformed Baptist @doctorgill

And they sat down in ranks,.... Or "beds": in such form as little beds are placed in a garden, or as rows of vines in a vineyard, in which form the scholars of the wise men sat in their schools: it is said (g), "R. Eliezer ben Azariah expounded before the wise men in the vineyard (i.e. the university) of Jabneh: though was there a vineyard there?

Albert Barnes Presbyterian @notesbybarnes

Verse 40. In ranks. Literally, in the form of square beds in a garden. By square, regularly formed companies. By hundreds, and by fifties. Some companies had a hundred in, and some fifty. We need not suppose that these were exactly formed, or arranged; but that this was about the number. The expression indicates a multitude.