They said, What one is there of the tribes of Israel who didn't come up to Yahweh to Mizpah? Behold, there came none to the camp from Jabesh Gilead to the assembly.
"Four hundred young virgins that had not known man"  (Judges 21:12). None of the commentators I have consulted mentions anything concerning the basis of this selection.  Did it follow a cruel and inhuman physical inspection, or just how was it done?  Perhaps it is a merciful omission that we are not told.