Reported by Imam Malik bin Anas on the authority of Nafi that he heard Abdullah bin Umar (may Allah be Pleased with him)[1], whilst he was ascended on Mount as-Safa, supplicating::
.اللهم إنك قلت : (ادعوني أستجب لكم) و إنك لا
تخلف الميعاد
O Allah! You said, "Call upon me, I will respond to you"
(40:60) and you do not fail on your promises!
وإني أسألك كما هديتني للإسلام
أن لا تنزعه مني حتى تتوفاني وأنا مسلم
And I ask you, just like you guided me to al-Islam, that you do not
remove it from me until I die whilst I am still Muslim.
Muwatta of Imam Malik, 1091
[1]
Imam an-Nawawi said this narration is on the condition of the two Shaykhs
(al-Bukhari and Muslim) [al-Majmoo’ 8/68] and is known with the scholars of Hadeeth
as “The Golden Chain”