Reference for Bava Kamma 227:4

אלא דאמרי' ליה ארבעית לי אריא אמצראי משמתינן ליה עד דקביל עליה כל אונסא דאתי מחמתיה:

did the Master not state<span class="x" onmousemove="('comment',' Ibid. 108b. ');">⁶</span> that where he buys from a heathen or sells to a heathen the right of [pre-emption enjoyed by] the nearest neighbour to the boundary does not apply?<span class="x" onmousemove="('comment',' For he who is outside the covenant of the law could not be compelled to abide by its principles. ');">⁷</span>

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