Reference for Chullin 283:1

בעומד ואומר זה וזה אני נוטל סגיא

it is sufficient to stand by and say: 'This one and that one I shall take'.<span class="x" onmousemove="('comment',' In accordance with the view of Beth Hillel; Bez. 10a.');">¹</span>

Jastrow