The Prophet ﷺ said, "The Black Stone is from Paradise."
أخبرني إبراهيم بن يعقوب قال حدثنا موسى بن داود عن حماد بن سلمة عن عطاء بن السائب عن سعيد بن جبير
أن النبي ﷺ قال الحجر الأسود من الجنة
No references are available.
[Its isnad is hasan] Reported by Tirmidhi, Hajj, chapter on the merit of the Black Stone, the corner, and the standing place, no. 877, from the hadith of Ata bin Saaib in this wording, and he said, hasan sahih. It is also found in Kubra, no. 3916. This hadith has many corroborating narrations, see Targheeb wal-Tarheeb 2/194, 195, and elsewhere.