Abu Najih 'Amr bin 'Abasah (May Allah be pleased with him) reported:
In the Pre-Islamic Period of Ignorance, I used to think that people who used to worship idols, were deviated and did not adhere to the true religion. Then I heard of a man in Makkah who was preaching a message. So I mounted my camel and went to him. I found that (this man who was) Messenger of Allah (ﷺ) remained hidden because of the persecution by his people. I had entered Makkah stealthily and when I met him I asked him, "Who are you?" He (ﷺ) said, "I am a Prophet." I asked; "What is a Prophet?" He said, "Allah has sent me (with a message)". I asked, "With what has He sent you?" He said, "He sent me to strengthen the ties of kinship, to destroy idols so that Allah alone should be worshipped and nothing should be associated with Him". I asked, "Who has followed you in this?" He said, "A freeman and a slave". (At that time only Abu Bakr and Bilal (May Allah be pleased with her) were with him). I said, "I shall follow you". He said, "You can not do that now. Do you not see my situation and that of the people? Go to your people, and when you hear that my cause has prevailed, come to me". So I went back to my people, and while I was with my people, Messenger of Allah (ﷺ) emigrated to Al-Madinah. I continued to ask people about him till some of my people visited Al- Madinah. On their return, I asked them, "How is that man who has arrived in Al-Madinah faring?" They said, "People are hastening to him. His own people had planned to kill him but did not succeed." Then I went to Al-Madinah and came to him and said, "O Messenger of Allah, do you recognize me?" He (ﷺ) said, "Yes, you are the one who met me in Makkah." I said, "O Messenger of Allah, tell me of that which Allah has taught you and of which I am unaware. Tell me about Salat first." He (ﷺ) replied, "Perform the Fajr (morning) Salat, then stop Salat until the sun has risen up to the height of a lance, for when it rises, it rises up between the horns of the devil, and the infidels prostrate themselves before it at that time. Then perform Salat, for Salat is witnessed and angels attend it, until the shadow becomes equal to the length of its object; then stop Salat, for at that time Jahannam (Hell) is heated up. Then pray when the shadow becomes longer, for the prayer is witnessed and angels attend it, until you perform 'Asr prayer; then stop Salat till sun sets, for it sets between the horns of a devil. At that time the infidels prostrate themselves before it." I then asked the Messenger of Allah to tell me about Wudu', and he (ﷺ) said, "When a person begins the Wudu' and washes his mouth and nose, the sins committed by his face, mouth and nostrils are washed out. Then when he washes his face as commanded by Allah, the sins of his face are washed out with the water from the sides of his beard. Then when he washes his hands up to elbows, the sins of his hands are washed out through his fingers with water. Then he passes his wet hands over his head and the sins of the head are washed out through the ends of his hair with water. Then he washes his feet up to the ankles, the sins of his feet are washed out through his toes with water. Then, if he stands up for Salat and praises Allah, glorifies Him, proclaims His Greatness as He deserves and devotes his heart wholly to Allah, he emerges sin free as the day he was born".
When 'Amr bin 'Abasah (May Allah be pleased with him) narrated this Hadith to Abu Umamah (May Allah be pleased with him) a Companion of the Prophet (ﷺ), the latter said to him, "Watch what you are saying. O 'Amr bin 'Abasah, a man will be getting all of this in one shot?" 'Amr (May Allah be pleased with him) replied, "O Abu Umamah, I have attained old age, my bones have become dry, my death is approaching and there is no need for me to tell lies concerning Allah and His Messenger (ﷺ). Had I not heard this from the Messenger of Allah only once, twice, thrice (and he counted up to seven) I would never have reported it. Indeed I have heard this frequently".
[Muslim].