Ibn Ishaq محمد بن إسحاق بن يسار‎ · Model Behavior of the Prophet (Kitab Al-Sunnah)

Do not revile my Companions; by him in whose hand my soul is, if one of you contributed the amount of gold equivalent to Uhud, it would not amount to as much as the mudd of one of them, or half of it.

Do not distinguish between the Prophets.

Do not sit with those who believe in free will and do not address them before they address you.

The tradition mentioned above has also been transmitted by Simak through a different chain of narrators to the same effect.