Musannaf Ibn Abi Shaybah

Hazrat Mus'ab bin Sa'd narrates that when Hazrat Sa'd would complete the Tashahhud, he would say these words: I declare Allah to be pure filling the earth and the heavens, and filling whatever is between them, and filling what is beneath the soil. All praise belongs to Allah filling the earth and the heavens, and filling whatever is between them, and filling what is beneath the soil. Allah is the Greatest filling the earth and the heavens, and filling whatever is between them, and filling what is beneath the soil. (Hazrat Shu'bah said: whether Allahu Akbar or Alhamdulillah was said first.) And all praise is for Allah, pure and blessed praise. There is no deity except Allah, He is alone, He has no associate, to Him belongs the dominion and to Him belongs all praise, and He is capable over all things. O Allah, I ask You for all good. After making this supplication, he would say the Salam.

Hazrat Umair bin Saeed says that Hazrat Abdullah bin Masood (may Allah be pleased with him) used to teach the tashahhud in prayer and teach the tashahhud that when any of you finishes the tashahhud, he should say these words: O Allah! O Allah! Grant me the good that I know and the good that I do not know. I seek protection from the evil that I know and the evil that I do not know. O Allah! O Allah! I ask You for all the good that Your righteous servants have asked. O Allah! O Allah! I seek refuge from all the evils from which Your righteous servants have sought refuge. O our Lord! O our Lord! Grant us goodness in this world and goodness in the Hereafter, and save us from the punishment of Hell. O our Lord! We have believed, so forgive our sins, overlook our mistakes, and let our end be with the righteous. O our Lord! O our Lord! Grant us all that which You have promised to Your messengers and do not disgrace us on the Day of Resurrection; surely, You do not break Your promise.

Hazrat Abu Ubaidah narrates that Hazrat Abdullah would recite the Tashahhud, then send blessings upon the Messenger of Allah (peace and blessings be upon him), and then supplicate for himself.

Hazrat Sha'bi says that when you finish the Tashahhud, then supplicate for whatever you wish for your worldly life and the Hereafter.

Hazrat Shaibani and Hazrat Sha'bi say that during prayer, ask for whatever you wish in prayer for yourself.

Hazrat Usman bin Aswad says that I asked Hazrat Mujahid whether I can supplicate for myself in the obligatory prayer? He replied that do not supplicate for yourself until after the Tashahhud. I asked the same question to Hazrat Ata, and he said to emphasize seeking forgiveness.

Ibrahim says that the predecessors liked that after reciting the Tashahhud, the Imam should supplicate with these five comprehensive words: O Allah! We ask You for all good, that which we know and that which we do not know, and we seek refuge with You from all evil, that which we know and that which we do not know. Ibrahim says that no matter how much haste the Imam is in, he should not leave out these words.

Hazrat Abdullah says that in prayer, ask for your most important needs.

Hazrat Aun says that ask for your most important needs in prayer because the virtue of supplication in prayer is equal to that of voluntary prayer.

Hazrat Abu Burdah says that when Hazrat Abu Musa would finish the prayer, he would supplicate: O Allah! Forgive my sins, make my affairs easy, and bless my sustenance.