John Gill Commentary Mark 12:5

"And he sent another; and him they killed: and many others; beating some, and killing some." — Mark 12:5 (ASV)

And again he sent another
That is, another servant, or set of men, it may be in the times of the Maccabees, who were used in a very inhuman manner; see (Hebrews 11:37Hebrews 11:38) ;

and him they killed ;
either with the sword, or by inflicting some capital punishment, as stoning, strangling

and many others ;
that is, either the owner of the vineyard sent many other servants, or the husbandmen ill used many others that were sent to them:

beating some ;
with their hands, or with scourges;

and killing some ;
in one or other of the above ways.