Sunan Abi Dawud Book 2, Hadith 372
Ibn al-Munkadir, Ibn Abi Farwah and a number of jurists of Madina said to me: When you recite the supplication “I am first of the Muslims,” say instead; “I am one of the Muslims”.
When the Messenger of Allah (ﷺ) stood up for (offering) obligatory prayer, he uttered the takbir (Allah is most great) and raised his hands opposite to his shoulders, and he did so when he finished the recitation (of the Qur’an) and when he was about to bow; and he did like that when he raised (his head) after bowing. He did not raise his hands in prayer when he was sitting. When he stood at the end of two rak’ahs, he raised his hands in a similar way and uttered the takbir and supplicated in a more or less the same manner as narrated by ‘Abd al-‘Aziz in his version. This version does not mention the words “All good is in Thy Hands and evil does not pertain to Thee.” And this adds: He said when he finished the prayer: “O Allah, forgive me my former and latter sins, my open and secret sins; Thou art my deity; there is no God but Thee.
A man came panting to join the row of worshippers, and said: Allah is most great; praise be to Allah, much praise, good and blessed. When the Messenger of Allah(ﷺ) finished his prayer, he asked: Which of you is the one who spoke the words? He said nothing wrong. Then the man said: I (said), Messenger of Allah (ﷺ); I came and had difficulty in breathing, so I said them. He said: I saw twelve angels racing against one another to be the one to take them to Allah.
The narrator Humaid added: When any of you comes for praying, he should walk as usual (i.e. he should not hasten and run quickly); then he should pray as much as he finds it (along with the imam), and should offer the part of the prayer himself (when the prayer is finished) which the Imam had offered before him.