I saw ʿUmar go to the Black Stone and say: By Allah, I know that you are a stone and cannot cause harm or bring benefit. Were it not that I saw the Messenger of Allah ﷺ kiss you, I would not have kissed you. Then he leant down and kissed it.
أَمَا وَاللهِ إِنِّي لَأَعْلَمُ أَنَّكَ حَجَرٌ لَا تَضُرُّ وَلا تَنْفَعُ وَلَوْلا أَنِّي رَأَيْتُ رَسُولَ اللهِ ﷺ قَبَّلَكَ مَا قَبَّلْتُكَ ثُمَّ دَنَا فَقَبَّلَهُ