פירוש על קידושין 140:6

R. Nahman points out a problem—R. Yehudah should not be allowed to issue a ruling in his own favor after a case comes in front of him. It’s like making a prediction after you know the outcome.
R. Yehudah responds that R. Matanah agrees with him. Stay tuned—tomorrow we will meet R. Matanah.