Responsa for Pesachim 79:12

דכפרים מ"ט לאו משום דלא לתתי וקא קרי ליה סולת

For it was taught: One can discharge [the obligation] with fine bread and with coarse bread.<span class="x" onmousemove="('comment',' V. supra 37a.');">¹⁸</span> Now fine bread is impossible without washing [the grain]. R'Papa raised an objection against Raba: [With regard to] the flours and fine meals of Gentiles, those of villages are clean, while those of towns are unclean.

Teshuvot Maharam