Reference for Bava Metzia 193:7

ואי פקח הוא נימא ליה שאיל ברישא והדר אשקייך

Raba said: If a man wishes to borrow something from his neighbour and yet be free from responsibility, he should say to him, 'Give me a drink of water,' so that it constitutes a loan together with the owner's service. But if he [the lender] is wise, he should answer him, '[First] borrow it by threshing with it, and then I will give you a drink.'

Jastrow