תלמוד על שבועות 1:1

MISHNAH: There are two [kinds] of transport on the Sabbath which are four [kinds] inside, and two [kinds] which are four [kinds] outside¹On the Sabbath it is forbidden to move any load from a private to the public domain (or for a distance of at least 4 cubits in the public domain.) Inside a private domain there are no restrictions unless the article may not be moved at all. While any transport between domains is forbidden, it is a prosecutable offense only if there is a completed action, i. e., one person lifted the item up, transported it, and put it down. This applies both to transport from the private domain to the public one (“inside”) and vice versa (“outside”). In each case, the transport may be effectuated either by the person inside or the person outside (in which case the person is prosecutable but the person standing in the other domain is not involved) or it may be taken up by one person, taken over while moving by another person who then puts it down. In this case both participants have sinned but are not prosecutable. The possible cases are enumerated in Mishnaiot 1–4. “Liable” and “not liable” refer both to the possibility of prosecution for intentional Sabbath desecration and the obligation of a purification sacrifice in the case of unintentional infraction.. How is this? The poor man stands outside and the householder inside. If the poor man stretched out his hand inside and delivered into the householder’s hand or took something from it and brought it outside, the poor man is liable but the householder is not liable.
If the householder stretched out his hand outside and delivered into the poor man’s hand or took something from it and brought it inside, the householder is liable but the poor man is not liable.
If the poor man stretched out his hand inside and the householder took from it or gave into it and he then took it out, neither is liable.
If the householder stretched out his hand outside and the poor man took from it or gave into it and he then took it in, neither is liable.