The Messenger of Allah ﷺ visited a man from the Ansar who was ill. When he drew near the man's home, he heard him speaking with someone inside. After asking permission to enter, he went in but saw no one there.The Messenger of Allah ﷺ said to him, "I heard you speaking with someone."The man replied, "Messenger of Allah, I had gone into my house overwhelmed with grief from people's talk and from the fever afflicting me, and a man came in to see me. After yourself, I have never seen anyone with a more dignified bearing or finer speech than him."The Prophet ﷺ said, "That was Jibreel. Indeed, among you are Some men who, if one of them were to swear an oath by Allah, Allah would surely fulfill it for him."
عاد رسول الله ﷺ رجلا من الأنصار، فلما دنا من منزله، سمعه يتكلم في الداخل، فلما استأذن عليه، دخل، فلم ير أحدا، فقال له رسول الله ﷺ: سمعتك تكلم غيرك. فقال: يا رسول الله، لقد دخلت الدار اغتماما من كلام الناس مما بي من الحمى، فدخل علي رجل ما رأيت رجلا قط بعدك، أكرم مجلسا ولا أحسن حديثا منه. قال: ذاك جبريل، وإن منكم لرجالا لو أن أحدهم أقسم على الله لأبره.
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Bazzar narrated it in Kashf Astar (3/306-307), and Tabarani in Al-Kabir (11/12-11), and in Al-Awsat - Majma Bahrain (3954), all of them through the route of Muhammad bin Abdul-Wahhab Harithi, who said, Yaqub Qummi related to us, from Jafar bin Abu Mughira, from Saeed bin Jubayr, from Ibn Abbas, who said, and then he related it.Its chain of transmission is hasan on account of Yaqub bin Abdullah Qummi and Jafar bin Abu Mughira Qummi, for both of them make the hadith hasan. Ibn Hajar also graded its chain hasan in Mukhtasar Zawaid Bazzar (2/377).