The Prophet ﷺ said in a long hadith, "Then the angels, the prophets, and the martyrs will be permitted to intercede. They will intercede and bring people out, intercede and bring people out, intercede and bring people out."Wazad Mura also added, "And they will intercede and bring out everyone who has in his heart even an atom's weight of faith."
عن النبي ﷺ قال في حديث طويل: ثم يؤذن للملائكة والنبيين والشهداء أن يشفعوا، فيشفعون ويخرجون، ويشفعون ويخرجون، ويشفعون ويخرجون، وزاد عفان مرة فقال أيضا: ويشفعون ويخرجون من كان في قلبه ما يزن ذرة من إيمان.
Ahmad (20440), Bazzar (3671), Tabarani in al-Saghir (929), and Ibn Abu Asim in al-Sunnah (838) all narrated it, from the hadith of Affan bin Muslim, who said, Saeed bin Zayd narrated to us, who said, I heard Abu Sulayman al-Asri, who said, Uqba bin Sahban narrated to us, from Abu Bakra, from the Prophet ﷺ, and he mentioned it.Its chain of transmission is hasan because of Saeed bin Zayd, who is the brother of Hammad bin Zayd, for he is hasan al-hadith. The discussion of this is set out at length in the book on faith and the book on the description of the resurrection.