“I have a maneh in your possession,” [and] he replied before witnesses, “Yes.” On the next day, [when] he said to him, “Give it to me,” [the other replied,] “I gave it to you” —- he is exempt. [But if he replied,] “You have nothing in my possession” —- he is liable.  “I have a maneh in your possession,” [and] he re-plied, “Yes”; [to which the other responded,] “Do not give it to me except before witnesses.” On the next day, [when] he said to him, “Give it to me,” [the other replied,] “I gave it to you” —- he is liable, because he is required to give it to him with witnesses.