Hadith 8:516
Abu Bakr narrated to us, he said: Ibn Fudayl narrated to us, from Hajjaj, from Ata, from Ibn Abbas, who said: When you are parallel to it, say "Allahu Akbar" (God is the Greatest), supplicate, and invoke blessings upon the Prophet, may God bless him and grant him peace.
حدثنا أبو بكر قال ثنا بن فضيل عن حجاج عن عطاء عن بن عباس قال إذا حاذيت به فكبر وادع وصل على النبي صلى الله عليه وسلم