Salam.
I found the following from Shaykh Ahmad Zarruq, the great Shaykh of the Shadhili tariqah who said in his book Uddat al-Murid al-Sadiq:
“I heard a person saying whilst indicating to himself:
‘Every Shaykh who does not guarantee for his murid [that he will help him] in three places – meaning at the time of death, at the time of being questioned [in the grave] and on the bridge [sirat] – is a fraud.’
This is an immense affliction! this is because the state of the Shaykh in these three places is unknowable, likewise the state of all of the creation, and the next world will be a day where Masters will not be able to help each other nor can they be sought help from – except those whom Allah bestows His mercy upon! The supplication of the Messengers upon the Sirat will be “Allahumma sallim sallim” so how can other than the Messengers possess that which they do not? May Allah protect us from this disgraceful matter and lying against Him. This is a great tribulation and mistake which has occurred from this person, and this is due to his ignorance, good opinion of himself and love of leadership. Added to this is his eating in the name of the religion, accompanying the oppressors, giving preference to the rich over the poor and those who hold him in esteem over those who do not…”