מדרש על משלי 29:3

(Fol. 64a) R. Juda, in the name of Samuel, said: "He who drinks one-fourth of a Lug of wine should not decide any legal question." "This tradition is not a good one," said R. Nachman, "for I know that unless I do drink a quarter of a Lug of wine, I feel that my head is not clear." "Why," said Raba to him, "should the master express himself so? Has not R. Acha, the son of R. Chanina, said, 'What is meant by the passage (Pr. 29, 3.) But he that keepeth company with harlots will lose (his) wealth.' This means that whoever says one Halacha (Law) is beautiful and that the other Halacha is not beautiful will lose the wealth of the Torah (he will forget it)." "I take it back," R. Nachman said to him. Rabba b. R. Huna said: "One who is tipsy should not pray; but if he does pray, his prayer will nevertheless be acceptable. If one is intoxicated, he should not pray; and if he does pray his prayer shall be considered an abomination." When can one be termed tipsy and when intoxicated? This we learn from the incident of R. Abba b. Shumni, and R. Menashia, the son of R. Jeremiah of Diphti, who were taking leave of one another when they were on the boat which crossed the river of Yuphthi. They agreed to let each one say an Halacha which should be new to the hearer; for R. Mari, the grand-son of R. Huna b. Abba, said, "A man must not leave his associate otherwise than with a word of Halacha; by which he may remember him." So one began thus: "When can one be termed tipsy and when intoxicated? If one would have enough sense to speak to a king, he is merely tipsy; but one who would not have enough sense to converse with a king is called intoxicated." The other replied and said: What shall he who takes possession of the estate of a proselyte [who has no heirs-in-law] do [with the wealth] in order that it may endure with him? Let the possessor buy a Torah (a scroll)."