He was from Iraq and a great saint who was famous for revelation and preaching . For this reason many of saints described his qualities.
The reason of his fame is that once he got a paper on the way on which it was written Bis Milla Irrehman Nirrahim.( In the name of Allah the most beneficent and merciful ) .For the sake of respect he made a pill from the paper and swallowed it and in the same night he heard in his dream in which Allah told him that “ He will widen the means for his wisdom and sagacity as he respected his name.” After that for a long time he was busy in preaching and propagation of Islam.
A wealthy person sent his slave to the bazaar to bring some thing for him from there but the slave was joined the meeting in which he was preaching. There was a poor derwesh ( mystic) person so Mansur told the gathering to pay four dirhams to that darwesh and for this he will pray for them for their four wishes. The slave who was going to the bazaar with four dirhams and he was given four dirhams to that darwesh . Upon this Mansur asked the slave “ Which prayers he wanted.”
The slave h told him that “ First he wanted to be free and
Second may Allah grant repentance for his master , and
third he should get reward for the helping darwesh person so he may get returned back his four dirhams .
Fourthly Allah may bless him and the persons who were present in this meeting.
So accordingly Mansur prayed for the above wishes of the slave. When the slave reached back to the house of his master and he was very angry and asked him the reason of his delay.? So the slave told him all the details and upon hearing the story he freed him and paid him also four hundred dirhams and he was repent. In that night the master saw in the dream in which Allah told him that “ Inspite of your bad characters I have blessed you and your slave and the persons who were present in that meeting and Mansur Amer.”
During his preaching meeting some body presented him some lines of poetry and the meaning of which is as follows .
That one who is not pious one but he is advising others for the pious path is like a doctor who himself is patient but he is treating the other patients.
One night he was passing from a house and heard a voice of hymns “ Oh : Allah I have committed sins not due to disobedience but due to fraud of the Satan and sole so forgive me due to your grace and kindness.” When he heard this he read the following Quranic verse in the un-controlled condition “ Oh : the people of faith protect yourself, your family members and your sole from the fire of hell . The men and stones are the fuel of hell . ’’ In the next morning when he was passing from that house and he heard some body was weeping so asked the reason for it. They told that some body recited one verse at the door during the night and when the boy heard the same and due to fear of Allah he was died. When he heard this he told “ He was killer of that boy.”
Caliph Haroon Al- Rashid asked him “ Who is great learned person in the mankind.? And who is a great ignorant man ?”. He replied that “ The great learned person is one who is obedient and having fear of Allah. The greatest ignorant man is one who is a poor and sinner .” “ The heart of mystic saint is the center of remembrance of Allah. The heart of a person who loves the world will be the centre of greed and desires . He told further that “ There are two kinds of mystic persons . “
First one who himself takes interest in efforts and mystic exercise .
Second one is that person who for the pleasure of Allah joins the way of rightness and do worship.
How the wisdom acts in the following persons.
- Hetold wisdom speaks the language of affirmation in the heart of mystic persons.
- The wisdomspeaks the language of explanation in the heart of ascetic person .
- In the worshipper’s heart it speaks the language ofguidance.
- In the heart of followersit speaks the language of thinking.
- In the heart of learned personsit speaks the language of remembrance of Allah .
The best person is one whose occupation is worship and his wishes and desires are darweshi (mysticism) and loneliness and he will think about death and life after the death and who always think for repentance.
He told that “ The heart is source of light and if the desire of the world enters into one’s heart then that light will finish in him and darkness will cover it.’’ One who follows his sole then he will kill himself in this way. One who is not patient on his difficulties then he will face difficulties in the next world. One who left this world it means worldly matters and loves Allah then he will never face any grief and the silent man will not face any apology. We should keep away from any sin and it is better for us otherwise we will become a great sinner.
Upon his death Abu Hasab Sherani saw him in his dream and asked him how Allah blessed him.? He told “ Allah blessed him and asked him to do praise and eulogy for him in presence of angels same as he used to praise and eulogy for him in the other world.”