Parashas Metzora · Passuk 14:07
Chabad.org — English translation + Rashi
Torah Temima points to Tosefta Negaim 8.
English: “Over the open field” — he may not stand in Yafo and throw it into the sea, nor in Gevat and throw it into the desert, nor outside the city and throw it into the city; rather, he stands inside the city and throws it beyond the wall.
Location of release
Chazal define the proper place and direction for releasing the live bird.