Reference for Kiddushin 62:6

רב יוסף כי הוה שמע קל כרעא דאמיה אמר איקום מקמי שכינה דאתיא אמר רבי יוחנן אשרי מי שלא חמאן רבי יוחנן כי עברתו אמו מת אביו ילדתו מתה אמו וכן אביי איני והאמר אביי אמרה לי אם ההיא מרבינתיה הואי

Said they to him, 'You have not yet reached half the honour [due]: has she then thrown a purse before you into the sea without your shaming her? ' When R'Joseph heard his mother's footsteps he would say: 'I will arise before the approaching Shechinah.' R'Johanan said: Happy is he who has not seen them.<span class="x" onmousemove="('comment',' His parents, because it is so difficult to honour them adequately. - Of course, he is not to be understood literally. Also, it was a form of self comfort for not having known his parents.');">¹⁰</span>

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