Our Shaykh Ziauddin Abun Najeeb Suhrawardi (Allah have mercy on him) narrates that,

‘The virtue (khair) in the people of Tasawwuf will last only till they act with disinclination amongst themselves. They will be destroyed once they develop mutual concordance and live in harmony with each other.

Shaykh Ruaim (Allah have mercy on him) has pointed out that this means that they should keep an eye on  and hold each other accountable (that is, do their muhasaba for things that are inappropriate).’

Awarif al-Ma’arif, page 267 (Urdu translation published by  Progressive books, Lahore)