John Gill Commentary Mark 8:9

"And they were about four thousand: and he sent them away." — Mark 8:9 (ASV)

And they that had eaten were about four thousand
That is, men, besides women and children, as Matthew observes; (See Gill on Matthew 15:38).

and he sent them away ;
some that came dumb, with their speech, and deaf, with their hearing; others that were maimed, with perfect healing of their wounds, and with their limbs sound and whole; others that came lame, he dismissed leaping; and others that were blind, with their sight restored to them, and all of them full.