Sunni references...
Sunni references: Fada'il al-Sahaba, by Ahmad Ibn Hanbal, v2, Traditions #109, #277 Sahih al-Tirmidhi, v5, p329, p662 Musnad Ahmad Ibn Hanbal, v1, pp88,148,149 from several chain of narrators al-Kabir, by al-Tabarani, v6, p264, p265 Hilyatul Awliya', by Abu Nu'aym, v1, p128 Also al-Tirmidhi, Ahmad, al-Hakim and many others narrated that the Messenger of Allah said: "Heaven has not shaded, nor has the earth carried a person more straight forward than Abu Dhar.
He walks on earth with the immaterialistic attitude of Jesus, the son of Mary." Sunni reference: Sahih al-Tirmidhi, v5, p334, Tradition #3889 Tahdhib al-Athar, v4, pp 158-161 Musnad Ahmad Hanbal, #6519, #6630, #7078 al-Mustadrak, by al-Hakim, v3, p342 al-Tabaqat, by Ibn Sa'd, v4, part 1, pp 167-168 Majma' al-Zawa'id, by al-Haythami, v9, pp 329-330 Ibn Majah, in his authentic Sunan, narrated that Imam Ali said: I was sitting in the house of the Prophet and Ammar asked to see him.
Then Prophet said: "Welcome the good and the purified." Ibn Majah also narrated that Aisha narrated that the Messenger of God said "Whenever Ammar is given two alternatives, he always chooses the most righteous of the two." There are much more authentic narrations told by the Prophet (PBUH&HF) about Ammar, such as "Ammar is full of faith." Also Prophet said: "A band of rebels will kill Ammar." Sunni references: Sahih Muslim, English version, Chapter # MCCV, pp 1508-1509, Trditions #6966-6970 (five traditions).
al-Mustadrak, by al-Hakim, v3, p383 Now to see who those rebels were, look at Musnad Ahmad and Tabaqat Ibn Sa'd who narrated: "In the Battle of Siffin, when the head of Ammar Yasir (RA) was cut off and taken to Muawiyah, two people were arguing over it, each one claimed that he had killed Ammar." Sunni references: Musnad Ahmad (Pub.
in Dar al-Maarif, Egypt 1952), Tradition #6538, #6929 - Tabaqat, by Ibn Sa'd, v3, p253 Also it is narrated that the Messenger of Allah (PBUH&HF) said: "Paradise longs for three men, Ali, Ammar and Salman." Sunni reference: Sahih al-Tirmidhi, v5, p332, Tradition #3884 Moreover al-Tirmidhi narrated: When the Messenger of God heard that Ammar and his parents were tortured in Mecca, he (PBUH&HF) said: "Members of Yasir's family, be patient.
Your destination is paradise." Sunni Reference: Sahih al-Tirmidhi, v5, p233, Thus, Ammar and his parents were the first people declared by the Prophet to be dwellers of paradise.