Reference for Yevamot 126:1

מן החטא מקרי ליה רב יהודה לרב יצחק בריה (קהלת ז, כו) ומוצא אני מר ממות את האשה א"ל כגון מאן כגון אמך

from sin'. Rab Judah was reading with his son R. Isaac the Scriptural text, <i>And I find more bitter than death the woman</i>. When the latter asked him, 'Who, for instance'? — 'For instance, your mother'. But,<span class="x" onmousemove="('comment',' BaH inserts, 'it is not so'. ');">¹</span> surely, Rab Judah taught his son R. Isaac, 'A man finds happiness<span class="x" onmousemove="('comment',' Or 'satisfaction', 'contentment'. ');">²</span> only with his first wife; for it is said, <i>Let thy fountain be blessed and have joy of the wife of thy youth'</i>;<span class="x" onmousemove="('comment',' Prov. V, 18. ');">³</span>

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