Musannaf Ibn Abi Shaybah 24226 — Those who said once roads

Iyas bin Mu'awiyah used to decide the right of pre-emption (shuf'ah) in favour of neighbours, until a letter from Umar bin Abd al-Aziz reached him. It was written in it: "Do not decide in favour of a neighbour, except if the two are partners with each other, or the house of the two is such that a single door closes on both of them; then you may decide in favour of the neighbour."