We were sitting at the door of al-Hasan when a man came and said, "My father told me, on the authority of my grandfather, who said, 'My father sent me to the Messenger of Allah ﷺ and said, Go to him and convey my greetings of peace to him.'"He said, "So I went to him and said, 'My father sends you greetings of peace.'"He replied, "Peace be upon you, and upon your father be peace."
حدثنا أبو بكر بن أبي شيبة حدثنا إسمعيل
إنا لجلوس بباب الحسن إذ جاء رجل فقال حدثني أبي عن جدي قال بعثني أبي إلى رسول الله ﷺ فقال ائته فأقرئه السلام قال فأتيته فقلت إن أبي يقرئك السلام فقال عليك السلام وعلى أبيك السلام
[Its isnad is daif]. See hadith no. 2934. It is also found in Musannaf Ibn Abu Shayba: 8/424-425, and Munziri said, "This isnad contains unknown narrators."