3:8Aal-i-Imraan

"The Messenger of Allah (ﷺ) taught me these words in witr. He said: Say: Allahumma ihdini fiman hadayta wa 'afini fiman afayta wa tawallani fiman tawallayta wa barik li fima a'tayta, wa qini sharra ma qadayta, fa innaka taqdi wa la yuqda 'alayk, wa innahu la yadhilluman walayta, tabarakta Rabbana wa at'alayt. Wa salla Allahu ala al-Nabi Muhammad (O Allah, guide me among those whom You have guided, pardon me among those You have pardoned, turn to me in friendship among those on whom You have turned in friendship, and bless me in what You have bestowed, and save me from the evil of what You have decreed. For verily You decree and none can influence You; and he is not humiliated whom You have befriended. Blessed are You, O Lord, and Exalted. And may Allah (SWT) send salah upon the Prophet Muhammad)'"

“My grandfather, the Messenger of Allah (ﷺ), taught me some words to say in Qunut of Witr: Allahumma ‘afini fiman ‘afait, wa tawallani fiman tawallait, wahdini fiman hadait, wa qini sharra ma qadait, wa barik li fima a’tait. Innaka taqdi wa la yuqda ‘alaik, innahu la yudhillu man walait. Subhanaka rabbana tabarakta wa ta’alait (O Allah, pardon me along with those whom You have pardoned, be an ally to me along with those whom You are an ally to, guide me along with those whom You have guided, protect me from the evil that You have decreed, and bless for me that which You have bestowed. For verily You decree and none can decree over You. He whom You support can never be humiliated. Glory is to You, our Lord, You are Blessed and Exalted).”

“I said to Umm Salamah: ‘O Mother of the Believers! What was the supplication that the Messenger of Allah (ﷺ) said most frequently when he was with you?” She said: ‘The supplication he said most frequently was: “O Changer of the hearts, make my heart firm upon Your religion (Yā Muqallibal-qulūb, thabbit qalbī `alā dīnik).’” She said: ‘So I said: “O Messenger of Allah, why do you supplicate so frequently: ‘O Changer of the hearts, make my heart firm upon Your religion.’ He said: ‘O Umm Salamah! Verily, there is no human being except that his heart is between Two Fingers of the Fingers of Allah, so whomsoever He wills He makes steadfast, and whomever He wills He causes to deviate.’”