John Gill Commentary Mark 12:25

"For when they shall rise from the dead, they neither marry, nor are given in marriage; but are as angels in heaven." — Mark 12:25 (ASV)

For when they shall rise from the dead
These seven brethren, and the woman; and so any, and every other:

they neither marry, nor are given marriage :
there will be no such natural relation subsisting, nor any need of any:

but are as the angels which are in heaven; (See Gill on Matthew 22:30).