Reference for Eruvin 159:11

אמר ליה רבי זירא לרבי יעקב (בריה) דבת יעקב כי מטית התם אקיף וזיל לסולמא דצור ובעי' מיניה מרב יעקב בר אידי

Thus said my father: Wherever you see an opportunity of relaxing the laws of 'erub seize it'.<span class="x" onmousemove="('comment',' Lit., 'make easy'.');">²⁴</span> And when the question was raised: 'Was the 'erub prepared out of her mother-in-law's food and the reason [for the prohibition]<span class="x" onmousemove="('comment',' By R. Hiyya.');">²⁵</span> was that she<span class="x" onmousemove="('comment',' The mother-in-law.');">²⁶</span>

Jastrow

Jastrow