The Book of Hajj
24/158. Chapter:
Not Touching The Other Two
Sunan an-Nasai
أَخْبَرَنَا عِمْرَانُ بْنُ مُوسَى، قَالَ حَدَّثَنَا عَبْدُ الْوَارِثِ، قَالَ حَدَّثَنَا أَيُّوبُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ مَا تَرَكْتُ اسْتِلاَمَ الْحَجَرِ فِي رَخَاءٍ وَلاَ شِدَّةٍ مُنْذُ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَسْتَلِمُهُ .
It was narrated that Ibn Umar said: "Since I saw the Messenger of Allah touch it, I did not fail to touching the Stone whether it was easy or difficult."
Reference : Sunan an-Nasa'i 2953In-book reference : Book 24, Hadith 336English translation : Vol. 3, Book 24, Hadith 2956