Imam Jafar Sadiq (A.S) narrates that whenever Jibrael visited the Prophet (PBUH), he used to sit politely like a slave. He never entered without obtaining the permission of the Prophet (PBUH)
Imam Hassan Askari (A.S) narrates that someone asked the Prophet (PBUH), "Is ‘Ali (A.S) superior or the angels?" The Prophet (PBUH) replied, "A person who has true love for ‘Ali (A.S) in his heart is superior to the angels!"
Imam Jafar Sadiq (A.S) narrates that one day a Jew came to the presence of the Prophet (PBUH) and asked, "Tell me! Are you and your Vicegerents (A.S), superior to Prophet Musa (A.S)?"
The Prophet (PBUH) replied, praising oneself is not right. But, since you have asked the question, I shall have to give the reply! Therefore, listen, and listen with care!
When Prophet Adam (A.S) committed the mistake, then he offered a prayer to this effect: ‘O Allah! For the sake of Muhammad (PBUH), and his progeny, forgive my mistake!' Allah, therefore pardoned Adam (A.S).'
When Noah (A.S)'s Ark was caught in the cyclone, he prayed to Allah,' O the Creator! For the sake of Muhammad (PBUH) and his progeny, guide my ark safely out of the cyclone!' His prayer was answered.
When Nimrod consigned Ibrahim (A.S), the Friend of Allah, to the fire, Ibrahim (A.S) prayed, ‘O Creator of Ibrahim (A.S)! For the sake of Muhammad (PBUH) and his progeny, make the fire cool on me!" The fire went cold.
When the magicians in the court of the Pharaoh attacked Musa (A.S) with their serpents, Musa (A.S) got scared and prayed, ‘O Allah! For the sake of Muhammad (PBUH) and his Vicegerents (A.S) deliver me from this danger!' Musa (A.S) was ordered to throw his staff. He complied; the staff became a bigger serpent and swallowed all the serpents of the magicians. Musa (A.S)'s prayer was thus answered.
O Jew! If Musa (A.S) comes today and does not accept me as the Prophet (PBUH), then his own prophet hood would go void! O Jew! I have a descendent; when he appears with the Order of Allah, ‘Isa (A.S) will descend from the Heaven and offer prayers standing behind him.
An authentic source records that on the day when Allah took an oath from the progeny of Adam (A.S), He asked all the prophets (A.S) and the angels, "Am I not your Creator, your Lord? Isn't Muhammad (PBUH) your Prophet? Aren't ‘Ali (A.S) and his Immaculate Progeny (A.S), your Imams??"
All of them replied in unison, "Definitely! Yes!!"
Those prophets, who took the earliest initiative in affirming this, were put in the rank of ulu al azm (The superior) prophets. The angels who took precedence over the other angels in responding, they became Muqarrabeen, or the angels closest to Allah!
source : www.tebyan.net