from Rosh Yeshiva from Mir:
To obtain this �learning Torah is his profession� exemption (Toraso Umanuso), a statement attesting to that fact needed to be signed by the Rosh Yeshiva of each Yeshiva institution. Rav Laizer Yudel, with tears in his eyes, would tell each student that asked for his signature on the statement that �Torah is his profession� the following: �I have never told a falsehood in my life. I am signing that your profession is to study Torah. Please learn diligently and commit yourself to it, so that I am not a liar.�
