Reference for Chullin 120:16

אמרה ליה

But it is impossible', said the moon, 'to do without the sun for the reckoning of the seasons, as it is written: And let them be for signs, and for seasons, and for days and years'.<span class="x" onmousemove="('comment',' Ibid. 14.');">³</span>

Jastrow