It was narrated from Anas bin Malik that the Prophet (ﷺ) said: “Be balanced in prostration; none of you should prostrate with his arms spread out like a dog.”

It was narrated that ‘Aishah said: “When the Messenger of Allah (ﷺ) raised his head from bowing, he would not prostrate until he had stood up straight. When he prostrated, he would raise his head and not prostrate again until he had sat up straight. And he used to spread out his left leg.”

It was narrated that ‘Ali said: The Messenger of Allah (ﷺ) said to me: “Do not squat between the two prostrations.”

It was narrated that ‘Ali said: “The Prophet (ﷺ) said: ‘O ‘Ali, do not squat like a dog.’”

It was narrated that Anas bin Malik said: “The Prophet (ﷺ) said to me: ‘When you raise your head from prostration, do not squat like a dog. Put your buttocks between your feet and let the tops of your feet touch the ground.”

It was narrated from Hudhaifah that the Prophet (ﷺ) used to say between the two prostrations: “Rabbighfir li, Rabbighfir li (O Lord forgive me, O Lord forgive me).”

It was narrated that Ibn ‘Abbas said: “When praying at night (Qiyamul-Lail), the Messenger of Allah (ﷺ) used to say between the two prostrations: ‘Rabbighfir li warhamni wajburni warzuqni warfa’ni (O Lord, forgive me, have mercy on me, improve my situation, grant me provision and raise me in status).’”

It was narrated that ‘Abdullah bin Mas’ud said: “When we performed prayer with the Prophet (ﷺ) we said: ‘Peace be upon Allah from His slaves, peace be upon Jibra’il and Mika’il and so-and-so and so-and- so.’ The Messenger of Allah (ﷺ) heard us and said: ‘Do not say peace (Salam) be upon Allah, for He is As-Salam. When you sit (during prayer) say: At-Tahiyyatu lillahi was-salawatu wat-tayyibatu; as- salamu ‘alayka ayyuhan-Nabiyyu wa rahmatullahi wa barakatuhu; as- salamu ‘alayna wa ‘ala ‘ibadillahis-salihin (All compliments, prayers and good words are due to Allah; peace be upon you, O Prophet, and the mercy of Allah and His blessings; peace be upon us and upon the righteous slaves of Allah).” For as you say that it will reach every righteous slave in the heavens and on earth. (Then say:) “Ashhadu an la ilaha illallah wa ashhadu anna Muhammadan ‘abduhu wa Rasuluhu (I bear witness that none has the right to be worshipped but Allah, and I bear witness that Muhammad is His slave and Messenger).” (Another chain) with similar wording. (Another chain) that `Abdullah bin Mas`ud said: "The Prophet (ﷺ) used to teach us the Tashahhud." And he mentioned similarly.