It was narrated that Az-Zubair bin Adiyy said:

A man asked Ibn Umar about touching the Black Stone and he said: 'I saw the Messenger of Allah touching it and kissing it.' The man said: 'What if it is too crowded and I am overwhelmed?' Ibn Umar, may Allah be pleased with him, said: 'Leave your "what if" in Yemen! I aw ate Messenger of Allah touching it and kissing it.'"

أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنِ الزُّبَيْرِ بْنِ عَرَبِيٍّ، قَالَ سَأَلَ رَجُلٌ ابْنَ عُمَرَ عَنِ اسْتِلاَمِ الْحَجَرِ، فَقَالَ رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَسْتَلِمُهُ وَيُقَبِّلُهُ . فَقَالَ الرَّجُلُ أَرَأَيْتَ إِنْ زُحِمْتُ عَلَيْهِ أَوْ غُلِبْتُ عَلَيْهِ فَقَالَ ابْنُ عُمَرَ رضى الله عنهما اجْعَلْ أَرَأَيْتَ بِالْيَمَنِ رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَسْتَلِمُهُ وَيُقَبِّلُهُ .