"in your field": excluding (from shikchah) one who makes sheaves in his neighbor's field. These are the words of R. Meir; the sages rule it liable (for shikchah).
(Devarim 24:19) "if you forget a sheaf in the field": and not a heap of sheaves. I might think (that shikchah obtains) even if he forgot more than two sheaves; it is, therefore, written "to the stranger, (one), to the orphan and to the widow shall it be," (orphan and widow being regarded as one unit). From here they ruled: Two sheaves are shikchah; three are not shikchah. Two piles of olives and carobs are shikchah; three are not shikchah. Two berries (fallen at a time) are peret (viz. Vayikra 19:10); three are not peret.