大方便佛報恩經 4.27

4.27

"Then Kalyāṇamitra untied the treasure pearl, gave it to his younger brother Pāpamitra, and instructed him, saying: 'If you are tired and lie down to sleep, I shall guard it; if I lie down to sleep, you must guard it.' At that time, it was Pāpamitra's turn to guard the treasure pearl. While his elder brother lay asleep, he immediately got up, found two dry bamboo thorns, pierced both of his brother's eyes, snatched the pearl, and departed.