Yahya related to me from Malik from Yahya ibn Said that al-Qasim ibn Muhammad showed them how to sit in the tashahhud, and he kept his right foot vertical and laid his left foot down, and sat on his left haunch not on his foot. Then he said, "Abdullah ibn Abdullah ibn Umar saw me doing this and related to me that his father used to do the same thing."
Muwatta Malik Book 3, Hadith 55
← Previous Hadith Yahya related to me from Malik from Abd ar-Rahman ibn al-Qasim that Abdullah ibn Umar told him that he used to see Abdullah ibn Umar cross his legs in the sitting position of the prayer.He said, "So I did the same, and I was young at the time. Abdullah ibn Umar forbade me and said, 'The sunna of the prayer is that you keep your right foot vertical and lay your left foot down.' I said to him, 'But you do the same (as I did).' He said, 'My feet do not support me.' "

Muwatta Malik Book 3, Hadith 54 Next Hadith → Yahya related to me from Malik from Ibn Shihab from Urwa ibn az- Zubayr from Abd ar-Rahman ibn Abd al-Qari that he heard Umar ibn al- Khattab say, while he was teaching people the tashahhud from the mimbar, "Say, Greetings belong to Allah. Pure actions belong to Allah. Good words and prayers belong to Allah. Peace on you, Prophet, and the mercy of Allah and His blessings. Peace be upon us and on the slaves of Allah who are salihun. I testify that there is no god except Allah. And I testify that Muhammad is His slave and His messenger."

'At-tahiyatu lillah, az-zakiyatu lillah, at-tayibatu wa's-salawatu lillah. As-salamu alayka ayyuha'nnabiyyu wa rahmatu'llahi wa barakatuhu. As-salamu alayna wa ala ibadi'llahi s-salihin. Ash-hadu an la ilaha illa 'llah wa ash-hadu anna Muhammadan abduhu wa rasuluh."

Muwatta Malik Book 3, Hadith 56