Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Abu Salamah that the Holy Prophet (peace be upon him) decreed the right of pre-emption (shuf‘ah) for every person whose share has not yet been divided, and (when) if the boundaries have been separated, then the right of pre-emption is not applicable.

Hazrat Usman states that there is no right of pre-emption in a well and a mill, and demarcation ends the right of every pre-emption.

Hazrat Umar (may Allah be pleased with him) said that when the boundaries are separated and people are aware of the boundaries, then there is no right of pre-emption (shuf‘a) among them.

Hazrat Iyas bin Mu'awiyah used to decide the right of pre-emption for neighbors, until a letter from Hazrat Umar bin Abdul Aziz reached him. It was written in it that do not decide in favor of the neighbor. However, if both are partners with each other or if the house is such that both have access through the same door, then you may decide in favor of the neighbor.

Hazrat Umar bin Abdul Aziz (may Allah have mercy on him) said: When the land is divided, boundaries are marked, and the paths are separated, then the right of pre-emption is no longer applicable.

Hazrat Umar (may Allah be pleased with him) said: When the boundaries are separated and people recognize their respective rights, then none of them has the right of pre-emption.