Reference for Menachot 187:16
איתמר לחם הפנים כיצד עושין אותו
And whence do we know that the Two Loaves were also [kneaded] in like manner? Because Scripture says. Shall be. And whence do we know that [the cakes of the Shewbread] were baked in pairs? Because the text states, And thou shalt set them.<span class="x" onmousemove="('comment',' Ibid. 6. Heb. The word 'them' stated in connection with the setting of the cakes, i.e., the placing of the cakes in the oven for baking, signifies that the cakes were baked in pairs and not singly.');"><sup>15</sup></span> Perhaps then the Two Loaves were also [baked] in like manner! Scripture therefore says. Them.<span class="x" onmousemove="('comment',' Thereby excluding the Two Loaves.');"><sup>16</sup></span> 'But have you not already drawn a deduction from the word 'them'?<span class="x" onmousemove="('comment',' Viz., that the baking of the Shewbread shall be in pairs. o,nau');"><sup>17</sup></span> - If for that purpose alone Scripture would have used the expression 'and thou-shalt-set-them';<span class="x" onmousemove="('comment',' Heb. : the pronoun 'them' might have been added as a suffix to the verb.');"><sup>18</sup></span> why 'and-thou-shalt-set them'? Two deductions may therefore be made. Our Rabbis taught: 'And thou shalt set them', that is, in a mould. There were three moulds: [the Shewbread] was first put into a mould<span class="x" onmousemove="('comment',' So as to obtain the required shape for the cakes, v. infra.');"><sup>19</sup></span> while still dough; in the oven there was also a kind of mould; and when it was taken out from the oven it was put into a [third] mould lest it become damaged. But why was it not put back again in the first mould? - Because after the baking it would have swollen.<span class="x" onmousemove="('comment',' And would not fit in the first mould.');"><sup>20</sup></span> It was stated: How did they fashion the Shewbread?