Fiqh-us-Sunnah Volume 1, Purification and Prayer, Fiqh 1.124B.

The Prophet’s practice illustrates that when the final sitting of the prayer has been made, one must recite the tashahud at that time. In one hadith, he said, “When you raise your head from the last prostration and sit for the tashahud, you have completed your prayer.”

Says Ibn Qudamah, “It has been related that Ibn ‘Abbas said, ‘We used to say, before the tashahud was made obligatory upon us, ‘Peace be upon Allah before His slaves, peace be upon Gabriel, peace be upon Mikhail.’ The Prophet, upon whom be peace, said, ‘Do not say, ‘Peace be upon Allah,’ but say, ‘Salutations to Allah.’ This proves that the tashah ud was made obligatory, although before it was not.”

The most authentic report concerning the tashahud is Ibn Mas’ud’s, who said, “When we would sit with the Prophet in the prayer, we would say, ‘Peace be upon Allah before His slaves, peace be upon so and so.’ The Prophet said, ‘Do not say peace be upon Allah, for Allah is peace. When one of you sits, he should say salutations be to Allah, and the prayers, and the good deeds, peace be upon us and upon Allah’s sincere slaves (if you say that, it applies to all of Allah’s sincere slaves in the heavens and the earth). I bear witness that there is no god except Allah. I bear witness that Muhammad is His slave and Messenger.’ Then you may choose whatever supplication you desire.” (Related by “the group.”)

Says Muslim, “The people are in agreement over the tashahud of Ibn Mas’ud, and the companions do not differ over it.” At-Tirmizhi, al-Khattabi, Ibn ‘Abdul-Barr and Ibn al-Munzhir all agree that Ibn Mas’ud’s hadith is the most authentic one on this topic.

Said Ibn ‘Abbas, “The Messenger of Allah used to teach us the tashahud like he taught us the Qur’an. He would say, ‘Salutations, blessings, prayers and good deeds for Allah. Peace be upon you, O Prophet, and the mercy of Allah and His blessings. Peace be upon us and the sincere slaves of Allah. I bear witness that there is no god except Allah. I bear witness that Muhammad is His slave and messenger.” (Related by ash-Shaifi, Muslim, Abu Dawud and anNasa’i.)

Says ash-Shaifi, “Different hadith have been related about the tashahud, but that one is the best in my opinion, for it is the most complete. Al-Hafez states, “Ash-Shaifi was asked about this choice and the tashahud of Ibn ‘Abbas, and he replied, ‘I have found it to be the most encompassing. I have heard it from Ibn ‘Abbas (through) authentic (chains). To me, it is more complete…”

There is another form of the tashahud that Malik chose. In al-Muwatta, it is stated that ‘Abdurahman ibn ‘Abdul-Qari heard ‘Umar ibn al-Khattab teaching the people, from the pulpit, this tashahud: “Salutations to Allah, purifications to Allah, the good deeds and prayers be to Allah. Peace be upon you, O Prophet, and the mercy of Allah and His blessings. Peace be upon us and Allah’s sincere slaves. I testify that there is no god but Allah, and I testify that Muhammad is His slave and messenger.”

Commenting on the stature of such hadith, an-Nawawi says, “Those hadith concerning the tashahud are all sahih. Hadith scholars are agreed that the strongest of them is the hadith of Ibn Mas’ud, and then the hadith of Ibn ‘Abbas. “Ash-Shaf’i said that any tashahud one uses will suffice, for the scholars agree that every one of them is permissible.”