A husband heard his wife saving that of their 10 children only one was his real son, so he left his fortune to him who would prove to be that one. All ten contested the will: each claiming to be the son. A judge, asked to decide, told the 10 to beat the dead body with their cudgels. 9 did so but one refused, and was thereby recognised to be the son.
The One Son Who Refused to Beat His Father's Corpse
Gaster, Exempla of the Rabbis, No. 311