ENOfficial
It was narrated that 'Abis bin Rabee'ah said: I saw 'Umar kissing the Black Stone and saying; I am kissing you and I know that you are just a stone; if I had not seen the Messenger of Allah (ﷺ) ﷺ kissing you, I would not have kissed you.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا أَبُو مُعَاوِيَةَ، قَالَ حَدَّثَنَا الْأَعْمَشُ، عَنْ إِبْرَاهِيمَ، عَنْ عَابِسِ بْنِ رَبِيعَةَ، قَالَ رَأَيْتُ عُمَرَ رَضِيَ اللَّهُ عَنْهُ يُقَبِّلُ الْحَجَرَ وَيَقُولُ إِنِّي لَأُقَبِّلُكَ وَأَعْلَمُ أَنَّكَ حَجَرٌ وَلَوْلَا أَنِّي رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُقَبِّلُكَ لَمْ أُقَبِّلْكَ.
sunnah.com