Bukhari

Hadith Commentary:
This hadith can be regarded as fundamental for the teaching of noble character.
For the reformation of society and the creation of the most righteous community, the presence of these virtuous qualities is essential; suspicion, fault-finding, and tale-bearing are all included in this. The objective of Islam is to convey the message that all human beings should live like the most sincere brothers to one another.

Hadith Commentary:
(1)
Integrity and trustworthiness require that a person should not interfere in another’s transaction or engagement matters; however, if the person himself withdraws or grants permission, then that is a different matter.

(2)
This prohibitive ruling applies in the case where the woman has developed an inclination and the engagement has been settled, because when Fatimah bint Qays was divorced and her waiting period (‘iddah) ended, Muawiyah ibn Abi Sufyan radi Allahu anhu and Abu Jahm radi Allahu anhu both sent her proposals of marriage.
In this matter, she consulted the Messenger of Allah sallallahu alayhi wa sallam, and he advised her to marry Usamah ibn Zayd radi Allahu anhuma.
In this situation, Fatimah bint Qays radi Allahu anhuma had not developed an inclination towards anyone, so the Messenger of Allah sallallahu alayhi wa sallam advised her to marry Usamah radi Allahu anhu.

(3)
Some individuals are of the opinion that the incident of Fatimah bint Qays radi Allahu anhuma abrogates the prohibitive ruling.
This position is questionable.
It should be clear that the aforementioned prohibitive ruling applies in the case where the first person has lawfully sent a marriage proposal.
If his sending of the proposal was not lawful—for example, if he sent a proposal during the waiting period (‘iddah)—then after the waiting period ends, anyone may send a marriage proposal, and the first proposal will be considered void.
(Fath al-Bari: 9/251)

Understanding (Tafaqquh)
➊ Engagement (mangni) is permissible provided that it does not involve Hindu customs or matters contrary to the Shariah.
➋ Every Muslim is a religious brother to another Muslim, provided that he does not commit acts contrary to the Book and the Sunnah.
➌ If a person becomes engaged to a woman and the dowry (mahr) and other matters are determined, then others should abandon the idea of proposing or marrying that woman. In this context, the mutual consent of both parties is also expressed. After this expression, it is not permissible for another person to attempt to become engaged to or marry that woman.
➍ The religion of Islam contains goodness and benefit for all of humanity.
➎ One should avoid matters of disagreement, discord, and quarrels.
➏ Also see: [ح351، 229]