Reference for Eruvin 58:6
וקתני סיפא ושאר כל המשקין ברביעית וכל השופכין ברביעית מדהתם על חד ארבע הכא נמי על חד ארבע
it was stated: And in the case of any other liquids [the prescribed quantity]<span class="x" onmousemove="('comment',' For which guilt is incurred by one carrying them on the Sabbath from a private into a public domain.');"><sup>18</sup></span> is a quarter' and in that of any liquid refuse' it is also a quarter'.' Now since there<span class="x" onmousemove="('comment',' In respect of carrying on the Sabbath.');"><sup>19</sup></span> [the quantities prescribed are] four<span class="x" onmousemove="('comment',' Of other liquids.');"><sup>20</sup></span> to one<span class="x" onmousemove="('comment',' Of wine; since in the case of the former a quarter of a kab was prescribed and in that of wine only a quarter of a quarter.');"><sup>21</sup></span>