Reference for Shabbat 194:9
תדע דקתני רבי יהודה מוסיף אי אמרת בשלמא אבות מאי מוסיף מוסיף אבות אלא אי אמרת תולדות מאי מוסיף איתמר נמי רבה ורב יוסף דאמרי תרוייהו לא חייב רבי יהודה אלא אחת
Rabina observed to R. Ashi: But on our original assumption that R. Judah held [him] liable to two, — if he desires it [to alight] here. he does not desire it [to alight] there, and vice versa?<span class="x" onmousemove="('comment',' In order to be liable to two it would be necessary that he should carry it out and deposit it in the street, then lift it up and carry it four cubits. and deposit it again. Now it may be argued that an object caught up in the air is as at rest, and therefore immediately it enters the street atmosphere it is as though it alights on the ground, and when it travels further it is as though it is taken up and carried again. But the thrower's intention is that it should come to rest at one place only, either as soon as it emerges into the street or after four cubits; in either case it cannot be regarded as though he deposited it, picked it up and deposited it again. Hence he can be liable for carrying it out only, but not for its passage in the street (v. Rashi and R. Han.). ');"><sup>8</sup></span>