(Authentic)
6. ʿAmmār ibn Yāsir, may Allah be pleased with him, said: I heard the Messenger of Allah ﷺ say:

“A servant may perform a prayer, yet only a tenth of it is written for him—or a ninth, an eighth, a seventh, a sixth, a fifth, a quarter, a third, or half.”

Recorded by Abū Dāwūd, al-Bayhaqī, and Aḥmad through two chains, one of which was authenticated by al-Ḥāfiẓ al-ʿIrāqī. Ibn Ḥibbān also included it in his Ṣaḥīḥ, as cited in al-Targhīb (1/184).

(Authentic)
7. ʿAbdullāh ibn al-Shikhkhīr reported:

I came to the Prophet ﷺ while he was praying, and a sound was coming from his chest like the rumbling of a boiling cauldron—meaning that he was weeping.

Narrated by Abū Dāwūd, al-Nasāʾī, al-Bayhaqī, and Aḥmad with a chain sound according to the criteria of Muslim; it was also collected by Ibn Khuzaymah and Ibn Ḥibbān in their Ṣaḥīḥ collections, as noted in Ṣaḥīḥ al-Targhīb wa’l-Tarhīb (no. 545). ⦗119⦘