John Gill Commentary John 21:5

"Jesus therefore saith unto them, Children, have ye aught to eat? They answered him, No." — John 21:5 (ASV)

Then Jesus says to them, children
And still they knew him not, though he used this endearing and familiar appellation, and which they had been used to hear from him; and he had called them by a little before his departure from them, (John 13:33) and which he uses here as expressive of his tender affection for them, their relation to him, and that he might be known by them:

have you any meat?
that is, as the Syriac renders it, (oelml Mdm) , "anything to eat"; meaning fish that they had caught, and whether they had got a sufficient quantity to make a meal of for him and them.

They answered him no.
They had got nothing at all, or at least what they had was far from being enough to make a breakfast of; for so a meal early in a morning may be most properly called, though it is afterwards called dining.

Christ's children, true believers, are sometimes without spiritual food; there is always indeed enough in Christ, and he has a heart to give it; but either through prevailing iniquity they feed on something else, or do not go to him for food, or go elsewhere; but he will not suffer them to starve; for as he has made provisions for them in the ministry of the word and ordinances, and he himself is the bread of life; if they do not ask him for food, he will ask them whether they have any; will kindly invite them to the provisions he himself makes; will bid them welcome, and bless them to them.