وَعَنِ الزُّبَيْرِ بْنِ عَرَبِيٍّ
قَالَ: سَأَلَ رَجُلٌ ابنَ عمرَ عَنِ اسْتِلَامِ الْحَجَرِ فَقَالَ: رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَسْتَلِمُهُ وَيُقَبِّلُهُ
A man asked Ibn Umar about touching the stone, and he replied that he had seen God s messenger touching it and kissing it.
Mishkat al-Masabih 2459, Book 11, The Rites of Pilgrimage, Hadith 61. 1 min read