Reference for Shabbat 280:17

וכי קא קארי אבבא איניש לא תימרון מנו אלא מני

R. Hisda also said: When one can eat barley bread but eats wheaten bread he violates, thou shalt not destroy.<span class="x" onmousemove="('comment',' Deut. XX, 19. I.e., it is wasteful extravagance. ');">¹³</span>

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