John Gill Commentary Numbers 11:13

"Whence should I have flesh to give unto all this people? for they weep unto me, saying, Give us flesh, that we may eat." — Numbers 11:13 (ASV)

From where should I have flesh to give to all this people ?
&c.] This seems to countenance the Israelites in their lusting after flesh, as if it was no evil in them, and as if it was but right they should have what they desired, though it was out of his power to give it them:

for they weep to me, saying, give us flesh, that we may eat ;
he seems to pity them, whereas he ought to have reproved them for their murmurings and ingratitude, and put them in mind of the manna which was provided for them every day, and with which they ought to have been content.