Allah's Messenger (ﷺ) said. "While I was sleeping, I saw myself (in a dream) performing Tawaf around the
Ka`ba. Behold, I saw a reddish-white man with lank hair, and water was dropping from his head. I
asked, "Who is this?' They replied, 'The son of Mary.' Then I turned my face to see another man with
a huge body, red complexion and curly hair and blind in one eye. His eye looked like a protruding out
grape. They said (to me), He is Ad-Dajjal." The Prophet (ﷺ) added, "The man he resembled most is Ibn
Qatan, a man from the tribe of Khuza`a. "
Sahih al-Bukhari Book 92, Hadith 75
The Prophet said: "The best of prayers for forgiveness is for a person to say: 'Allahumma, anta rabbi, la ilaha illa anta, khalaqtani wa ana 'abduka, wa ana 'ala 'ahdika wa wa'dika mastata'tu, a'udhu bika min sharri ma sana'tu, abuw'u laka bidhanbi, wa abuw'u laka bini'matika 'alayya faghfirli, fa innahu la yaghfirudh-dhunuba illa anta (O Allah, You are my Lord, there is no god but You. You have created me and I am Your slave and I am keeping my promise and covenant to You as much as I can. I seek refuge with You from the evil of what I do. I acknowledge Your blessing and I acknowledge my sin, so forgive me, for there is none who can forgive sin except You.)' If he says this in the morning, believing in it firmly, and dies on that day before evening comes, he will enter Paradise, and if he says it in the evening, believing firmly in it, and dies before morning comes, he will enter Paradise." Al-Walid bin Tha'labah contradicted him.
Sunan an-Nasa'i Book 50, Hadith 95