If he does not know, or he is not conversant with the law, and he said, ‘‘My Sabbath dwelling place is at my location,’’ his location acquires two thousand cubits for him in every direction. In a circle — [these are] the words of R’ Chanina ben Antignos. But the Sages say: In a square, like a square board, so that he may gain the corners.

This is what they have said: ‘‘The poor man may make an eruv with his feet.’’ Said R’ Meir: We can apply this only to a poor man. R’ Yehudah says: Both a poor man and a rich man; they did not say, ‘‘We may make an eruv with bread,’’ except to make it easier for the rich man, so that he not go out and make an eruv with his feet.