六祖大師法寶壇經 1.30

1.30

"When this verse had been written, the disciples were all amazed, and every one of them marveled, saying to one another: 'How extraordinary! One cannot judge people by their appearance; how could we have put a flesh-body bodhisattva to work for so long?' Seeing everyone's astonishment and fearing that someone might harm him, the Patriarch rubbed the verse out with his shoe and said: 'This too has not seen into its nature.' The assembly took it to be so.