Reference for Menachot 177:18

איכא דאמרי מלמעלה למטה שיערו ואיכא דאמרי ממטה למעלה שיערו

- The verse is indeed necessary; for otherwise I might have said that, since the All Merciful has spared him expense by allowing him to bring a poor [man's] sacrifice, no meal-offering at all is to be brought! And the others?<span class="x" onmousemove="('comment',' The Sages.');">¹³</span> - We do not find [they say] that he should be [exempt] entirely [from the offering].<span class="x" onmousemove="('comment',' The Divine Law has reduced the number and cost of the offerings for a man of poor means, but by no means has it exempted him entirely therefrom.');">¹⁴</span>

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