Tirmidhi

Explanation:
1:
He is called "Sayyid al-Qurra" (the leader of the reciters) because the Prophet (sallallahu alayhi wa sallam) said about him:
"The most proficient reciter among you is Ubayy."

Note:
(In the chain of narration, "Abu Muhammad" is unknown,
and "Abu Ubaydah" did not hear directly from his father Ibn Mas'ud (radi Allahu anhu).)

Benefits and Issues:
In the Sahihayn, glad tidings of Paradise have been given upon the death of three or two children.
It is narrated from Abu Sa'id al-Khudri radi Allahu anhu:
The Messenger of Allah sallallahu alayhi wa sallam said (to the women):
"Whichever woman among you sends forward three of her children (i.e., they pass away before her), they will become a barrier for her from the Fire of Hell."
A woman asked, "And two children? (Is there the same virtue for patience upon the death of two children?)"
The Messenger of Allah sallallahu alayhi wa sallam said, "Even two children (bring the same glad tidings for the one who sends them forward)." (Sahih al-Bukhari, al-Jana'iz, Chapter: The Virtue of One Whose Child Dies and He Seeks Reward, Hadith: 1249; and Sahih Muslim, al-Birr wa al-Silah wa al-Adab, Chapter: The Virtue of One Whose Child Dies and He Seeks Reward, Hadith: 2632)
And in some hasan (good) narrations, glad tidings of Paradise are given even for one child,
on the condition that faith and seeking reward (ihtisab) are present. See: (al-Silsilah al-Sahihah: 398/3, No. 1408)
Therefore, this narration is also correct in meaning.