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
Hadith No. 2953
Sunan an Nasai
Gradings:
Abu Ghuddah:
Sahih
Al-Albani:
Sahih
Zubair Ali Zai:
Isnaad Sahih