Par Pari referre.

Like for like, or one good turn deserves another; we say also, give him a Rowland for his Oliver. Dionysius, having engaged a musician to entertain his company, to induce him to exert himself he promised to give him a reward proportioned to the amusement he should afford his guests; the singer, in the hope of obtaining a splendid present, selected some of his choicest pieces of music, which he performed with such excellent skill as to give entire satisfaction to the audience: on applying for his pay, he was told he had already received «par pari», like for like. The pleasure he had enjoyed in expecting the reward, balancing that which the company had received in hearing him sing; he had also the further satisfaction of hearing his performance highly extolled, which is too often the only emolument that men of genius are able to obtain for their labours.