Abu Dawud

Benefits and Issues:
➊
The chain of narration of this report is weak.
However, the story of the shirt is authentically established.
(Al-Allamah Al-Albani)
➋
Visiting a Muslim to inquire about his health is a legal (shar‘i) right.
Similarly, it is also permissible to visit someone of bad character to inquire about his health.
And this is certainly a part of Islamic manners and chivalry.

➌
The son of this hypocrite, Abdullah radi Allahu anhu, was a sincere believing Companion radi Allahu anhu.
And perhaps the Messenger of Allah sallallahu alayhi wa sallam granted his shirt as a favor to this devoted and sincere lover.
And this act was a minor stratagem by a son for his father, hoping that perhaps by its blessing he might benefit in some way.
And it is also the case that the Noble Prophet sallallahu alayhi wa sallam, in this way, repaid a favor of this hypocrite.
That at the time of Badr, when the uncle of the Messenger of Allah sallallahu alayhi wa sallam, Abbas radi Allahu anhu, was taken captive,
he did not have a shirt.
So Abdullah bin Ubayy gave his shirt.
It is also said that whenever anything was asked from the Noble Prophet sallallahu alayhi wa sallam, he would not refuse.
And it is also said that perhaps this act occurred at a time when this ruling had not yet been revealed:
() “And do not ever pray [the funeral prayer] over any of them who dies, nor stand at his grave.” (At-Tawbah 9:84)
When any of these hypocrites dies, do not pray his funeral prayer,
and do not stand at his grave.
(‘Awn al-Ma‘bud)