Ibn Umar (Allah be pleased with them) said that Allah’s Messenger (ﷺ) prohibited Shighar which means that a man gives his daughter in marriage on the condition that the other gives his daughter to him in marriage with- out any dower being paid by either.
Maimuna daughter of al-Harith narrated to me that Allah’s Messenger (ﷺ) married her and he was not in the state of Ihram. And she (Maimuna) was my mother’s sister and that of Ibn ‘Abbas (Allah be pleased with them).
None amongst you should outbid another in a transaction, nor should he make proposals of marriage upon the proposal made by someone else.
A person should not enter into a transaction when his brother (had already entered into but not finalised), and he should not make proposal of marriage upon the proposal already made by his brother, until he permits it.
The above hadith has been narrated by Ibn Umar through another chain.
A hadith like this has been reported on the authority of Nafi’ with the same chain of transmitters.
” The person should not purchase in opposition to his brother.”
Do not outbid in a sale in order to ensnare. No man should enter into a transaction in which his brother has already entered, and no dweller of the town should sell on behalf of the villager. And no man should make a proposal of marriage which his brother has already made and no woman […]
A hadith like this has been narrated on the authority of Zuhri with the same chain of transmitters but with a slight alteration.
A Muhrim should neithermarry (in that state) nor make the proposal of marriage.