The Messenger of Allah ﷺ said, "There are phrases recited in succession after every obligatory prayer that will never disappoint the one who says them or practices them. Thirty-three glorifications of Allah, thirty-three praises of Allah, and thirty-four declarations of Allah's greatness."
و حدثنا الحسن بن عيسى أخبرنا ابن المبارك أخبرنا مالك بن مغول قال سمعت الحكم بن عتيبة يحدث عن عبد الرحمن بن أبي ليلى
عن رسول الله ﷺ قال معقبات لا يخيب قائلهن أو فاعلهن دبر كل صلاة مكتوبة ثلاث وثلاثون تسبيحة وثلاث وثلاثون تحميدة وأربع وثلاثون تكبيرة
Muslim reported from the hadith of Hakam, from Ibn Abu Layla, from Kaab, as a raised hadith, "There are phrases repeated after prayer that never disappoint whoever says them," from the hadith of Malik bin Muawwal, Amr bin Qays, and Hamza Zayyat. He said, Zayd bin Abu Unaysa, Layth bin Abu Salim, Ibn Abu Layla, and Qudayma also followed them in this, narrating from Thawri, from Mansur.Mansur was contradicted, however, in the narration of Abu Ahwas and Jareer from Mansur from Hakam, who reported it as a stopped hadith. Shuba likewise reported it from Hakam in the same way, except in the narration of Jafar Sayigh from Abdan from him.The correct view, and Allah knows best, is that it is a stopped hadith, because those who raised it were sheikhs who cannot stand up against Mansur and Shuba.
I say, what appears most likely to me is that the raised chain (marfu) is the more sound view, as Nawawi, may Allah have mercy on him, states, because those who raised it were a group, most of whom are reliable narrators. Those who reported it as stopped (mawquf), even though they may be more reliable, are fewer in number. Moreover, the raised version has also been reported from these same two narrators, as Daraqutni stated, and as Tirmidhi stated regarding Mansur, and as you can see in the narration of Bayhaqi, Tayalisi, and Abu Awana. And Allah knows best.