“Al-Ḥakam ibn Mūsā narrated to us; Hiql narrated to us from al-Awzāʿī with the same wording, but without that addition.”
It is clear that the addition does not harmonize with the flow of the narration. The very same wording occurs in another ḥadīth of Abū Hurayrah, so I fear that one of the transmitters confused the two reports and fused them into a single account. The wording of the ḥadīth in question will appear at the beginning of the next section, if Allah wills.
Glory and praise be to You, O Allah. I bear witness that there is no deity worthy of worship but You; I seek Your forgiveness and repent to You.
101—“Whoever says subḥānallāh (glory be to Allah) thirty-three times after every obligatory prayer, says al-ḥamdulillāh (all praise is due to Allah) thirty-three times, and says Allāhu akbar (Allah is the Greatest) thirty-three times—making ninety-nine—and then completes the hundred by saying: lā ilāha illā Allāh waḥdahu lā sharīka lah, lahul-mulk wa lahul-ḥamd wa huwa ʿalā kulli shayʾin qadīr (there is no deity worthy of worship except Allah alone, without partner; to Him belongs sovereignty and all praise, and He has power over all things), his sins will be forgiven even if they were like the foam of the sea.”
It was recorded by Muslim (2/98), Abū ʿAwānah (2/247), al-Bayhaqī (2/187), and Aḥmad (2/373, 383) through the route of Suhayl ibn Abī Ṣāliḥ, from Abū ʿUbayd al-Madhḥajī, from ʿAṭāʾ ibn Yazīd al-Laythī, from Abū Hurayrah, as a narration ascribed to the Prophet (peace and blessings be upon him).
This same count appears in another ḥadīth, except that, in place of the tahlīl (pronouncing lā ilāha illā Allāh), it adds one more takbīr alongside the thirty-three; that version will follow shortly, Allah willing.
Benefit: Al-Nasāʾī (1/198) and al-Ḥākim (1/253) narrated from Zayd ibn Thābit who said:
“They were commanded to say subḥānallāh thirty-three times after every obligatory prayer, to say al-ḥamdulillāh thirty-three times, and to say Allāhu akbar thirty-four times. A man from the Anṣār saw in his sleep that someone said to him, ‘Did the Messenger of Allah (peace and blessings be upon him) command you to say subḥānallāh thirty-three times after every prayer, to say al-ḥamdulillāh thirty-three times, and to say Allāhu akbar thirty-four times?’ He replied, ‘Yes.’ The voice said, ‘Make them twenty-five each, and include the tahlīl among them’—meaning twenty-five. When he awoke he came to the Prophet (peace and blessings be upon him) and related that to him, whereupon he said, ‘Make them that way.’”