Abis bin Rabi’ah said on the authority of ‘Umar He(‘Umar) came to the (Black) Stone and said “ I know for sure that you are a stone which can neither benefit nor injure and had I not seen the Apostle of Allaah ﷺ kissing you, I would not have kissed you.” (Using translation from Abū Dāʾūd 1873)  

أَعْلَمُ أَنَّكَ حَجَرٌ لَا تَضُرُّ وَلَا تَنْفَعُ «وَلَوْلَا أَنِّي رَأَيْتُ رَسُولَ اللهِ ﷺ قَبَّلَكَ مَا قَبَّلْتُكَ»  

أَمَا وَاللهِ لَقَدْ عَلِمْتُ أَنَّكَ حَجَرٌ وَلَوْلَا أَنِّي رَأَيْتُ رَسُولَ اللهِ ﷺ يُقَبِّلُكَ مَا قَبَّلْتُكَ قَالَ عَمْرٌو وَحَدَّثَنِي بِمِثْلِهَا زَيْدُ بْنُ أَسْلَمَ عَنْ أَبِيهِ  

"I saw Umar coming to the Stone and saying: 'I know that you are just a stone; had I not seen the Messenger of Allah kiss you I would not have kissed you.' Then he came close to it and kissed it." (Sahih) Chpater 148. How to Kiss It (Using translation from Nasāʾī 2937)  

إِنِّي أَعْلَمُ أَنَّكَ حَجَرٌ «وَلَوْلَا أَنِّي رَأَيْتُ رَسُولَ اللهِ ﷺ يُقَبِّلُكَ مَا قَبَّلْتُكَ ثُمَّ دَنَا مِنْهُ فَقَبَّلَهُ»  

"I saw Abdu Al-Qasim paying attention to you. (Using translation from Nasāʾī 2936)  

وَقَالَ «رَأَيْتُ أَبَا الْقَاسِمِ ﷺ بِكَ حَفِيًّا»