Koumyou offers his bony, callused hands, if Devero wants to take them. He doesn't try to initiate the contact, just makes the silent offer. "If I let go, will you stay and talk?"

Not, 'if the sutra lets go'. The bigger man had already proven with his words that he understands, at least on some level, that the line between Sanzo and sutra is blurred at best.