The Ruling on Delegating the Fulfillment of a Vow

I am an Egyptian citizen residing in Riyadh. My wife fell ill and was confined to bed, so I made a vow for the sake of Allah that if she recovered from this illness, I would slaughter a sheep and hold a celebration for the family and neighbors, to be considered charity for the sake of Allah. When I returned to Egypt, I found that my wife had recovered from her illness, so I decided to fulfill my vow. However, one of the neighbors passed away, which made it difficult for me to carry out the vow. I returned to Saudi Arabia, and now I ask: Is it permissible for me to send the value of the sheep to my brother so that he can act on my behalf and fulfill the vow, or is it not permissible for him to act on my behalf? Please advise us, may Allah reward you. The sender of the message is our brother, 'Atiyyah Jabir Muhammad ....... It appears you would like to proceed?
Answer: Yes, you may send the value to your brother, or you may instruct him to buy a sheep on your behalf, either as a gift from him or as a loan from you. Then he should slaughter it and give it as charity, or invite whichever of your relatives or neighbors you wish to this good deed.
The Prophet (peace and blessings be upon him) said: , and Allah (Glorified and Exalted is He) praised the one who fulfills his vow, saying: in Surat al-Insan: [al-Insan:7], praising the righteous and the pious for this deed.
Therefore, it is obligatory for you to fulfill the vow, and if you slaughter it there through your brother or any other agent acting on your behalf, there is no harm. Yes.