Jami‘ at-Tirmidhi 3415

Ubadah bin As-Samit, may Allah be pleased with him, narrated that:The Messenger of Allah (ﷺ) said: “Whoever wakes up in the night and says, ‘None has the right to be worshiped but Allah, alone, without partner, to Him belongs the Dominion, and to Him is the praise, and He has power over all things. And Glory is to Allah, and all the praise is to Allah, and ‘None has the right to be worshiped but Allah, and Allah is the greatest, and there is no might nor power except by Allah (Lā ilāha illallāh, waḥdahu lā sharīka lahu, lahul-mulku wa lahul-ḥamdu, wa huwa `alā kulli shai'in qadīr. Wa subḥān Allah, walḥamdulillāh, wa lā ilāha illallāh, wa Allāhu akbar, wa lā ḥawla wa lā quwwata illā billāh.)’ – then he said: ‘O my Lord, forgive me (Rabbighfirlī)’ – or he said – ‘then he supplicates, he shall be responded to. So he makes a firm determination, then performs Wudu', then he performs Salat, his Salat shall be accepted.”

Rabi`ah bin Ka`b Al-Aslami said:“I used to spend the night at the door of the Prophet (ﷺ), so that I may give him his water for Wudu', and I would hear him, for a long period of the night, saying: ‘Allah hears the one who praise Him (Sami` Allāhu liman ḥamidah).’ And I would hear him, for a long period saying: ‘All praise is due to Allah, Lord of the all that exists. (Al-ḥamdulillāhi rabbil-`ālamīn).’”

Zaid bin Thabit (ra) said:“We were ordered to say the Tasbīḥ at the end of every Salat thirty-three times, and to say the Takbīr thirty-four times.” He said: “Then a man from the Ansar had a dream in which someone said: ‘The Messenger of Allah (ﷺ) ordered you to say the Tasbīḥ at the end of every Salat thirty-three times, and to say the Taḥmīd thirty-three times, and to say the Takbīr thirty-four times?’ He said: ‘Yes.’ He said: ‘Then make them twenty-five and add the Tahlīl (saying Lā ilāha illallāh) to them.’ The next day he went to the Prophet (ﷺ) and informed him, so he said: “Do it.”