Anas said:

The prophet (ﷺ) persuaded them to say prayer in congregation and prohibited them to leave before he goes away from the prayer.

Narrated Talq ibn Ali al-Hanafi:

We came to the Prophet (ﷺ), and a man came and said: Prophet of Allah, what do you say if one prays in a single garment? The Messenger of Allah (ﷺ) then took off his wrapper and combined it with his sheet, and put it on them. He got up and the Prophet of Allah (ﷺ) led us in prayer. When he finished …

Sahl b. Sa’d said:

I saw the people tying their wrappers over their necks like children due to the narrowness of the wrappers behind the Messenger of Allah (May peace be upon him) during prayer. Someone said: Body of women, do not raise your heads until the men raise (their heads).

‘Ubadah b. al-Samit said:

we came to Jabir b. ‘Abd Allah. He said : I (Jabir) accompanied the Messenger of Allah (ﷺ) in a battle. He got up to pray. I had a sheet of cloth upon me, and I began to cross both the ends, but they did not reach (my shoulders). It had fringes which I turned over and crossed the two ends, and bowed…

Narrated Abdullah ibn Mas'ud:

I heard the Messenger of Allah (ﷺ) say: He who lets his garment trail during prayer out of pride, Allah, the Almighty, has nothing to do with pardoning him and protecting him from Hell.

Abu Hurairah said :

while a man was praying letting his lower garment trail, the Messenger of Allah (ﷺ) said to him: Go and perform ablution. He, therefore, went and performed ablution and then returned. He (the prophet) again said: Go and perform ablution. He again went, performed ablution and returned. A man said to …

Narrated Aisha, Ummul Mu'minin:

The Prophet (ﷺ) said: Allah does not accept the prayer of a woman who has reached puberty unless she wears a veil. Abu Dawud said: This tradition has been narrated by Sa;id b. Abi 'Arubah from Qatadah on the authority of al-Hasan from the Prophet (ﷺ).

Narrated AbuHurayrah:

The Messenger of Allah (ﷺ) forbade trailing garments during prayer and that a man should cover his mouth. Abu Dawud said: This tradition has also been narrated by 'Isi on the authority of 'Ata' from Abu Hurairah: The Prophet (ﷺ) forbade trailing garments during prayer.

Narrated AbuRafi':

Sa'id ibn AbuSa'id al-Maqburi reported on the authority of his father that he saw AbuRafi' the freed slave of the Prophet (ﷺ), passing by Hasan ibn Ali (Allah be pleased with them) when he was standing offering his prayer. He had tied the back knot of his hair. AbuRafi' untied it. Hasan turned to hi…

Narrated Abdullah ibn Abbas:

Kurayb the freed slave of Ibn Abbas reported: Abdullah ibn Abbas saw Abdullah ibn al-Harith praying having the back knot of the hair. He stood behind him and began to untie it. He remained standing unmoved (stationary). When he finished his prayer he came to Ibn Abbas and said to him: What were you …

‘Abd Allah b. al-Sa’ib said; the Messenger of Allah (ﷺ) led us in the morning prayer at Mecca. He began to recite Surah al-Mu;minin and while he came to description of Moses and Aaron or the description of Moses and Jesus the narrator Ibn ‘Abbad doubts or other narrators differed amongst themselves …

Narrated AbuSa'id al-Khudri:

While the Messenger of Allah (ﷺ) was leading his Companions in prayer, he took off his sandals and laid them on his left side; so when the people saw this, they removed their sandals. When the Messenger of Allah (ﷺ) finished his prayer, he asked: What made you remove your sandals? The replied: We sa…

Anas b. Malik reported:

A man from the Ansar said: I am a corpulent man-and he was (actually) a fat man; I cannot pray along with you. He prepared food for him and invited him to his house. (he said) (please) pray (here) so that I may see how you pray, and then I would follow you. They (the people) washed one side of their…

Anas b. Malik said; the prophet (ﷺ) used to visit Umm Sulaim. Sometimes the time for prayer would come and he would pray on out carpet that was really a mat. She (Umm Sulaim) used to wash it with water.

Al-Nu’man b. Bashir said:

the Messenger of Allah (ﷺ) paid attention to the people and said three times; straighten your rows (in prayer); by Allah, you must straighten your rows, or Allah will certainly put your faces in contrary directions. I then saw that every person stood in prayer keeping his shoulder close to that of t…

Al-Nu’man b. Bashir said:

the prophet (ﷺ) used to straighten us in the rows of prayer as the arrow is straightened, until he thought that we had learned it from him and understood it. One day he turned towards us, and shoulders in order, and say; Do not be irregular. And he would say: Allah and his Angels bless those who near the first rows.

Anas reported the Messenger of Allah (ﷺ) as saying :

Straighten your rows for the straightening of the rows is part of perfecting the prayer.

This tradition has also ben transmitted by Anas through a different chain of transmitters. This version goes:

when the Messenger of Allah (ﷺ) stood for prayer, he took it (the stick) in his right hand and turning (to the right side) said; keep straight and straighten your rows. He then took it in his left hand and said; keep straight and straighten your rows.

Narrated Abdullah ibn Abbas:

The Prophet (ﷺ) said: The best of you are those whose shoulders are soft in prayer.

Narrated AbdulHamid ibn Mahmud:

I offered the Friday prayer along with Anas ibn Malik. We were pushed to the pillars (due to the crowd of people). We, therefore, stopped forward and backward. Anas then said: We used to avoid it (setting a row between the pillars) during the time of the Messenger of Allah (ﷺ).