Should he offer a sacrifice (udhiya/qurbaani) or give the price of the sacrifice to his poor sick relative so that he can get treatment?

Can one not give qurbani and give that amount of money to a sick close
relaive for treatment? zakat money given to him which is not
sufficient for treatment.
Praise be to Allaah.
The basic principle is that offering the sacrifice is better than
giving its price in charity, because of what results from that of
drawing close to Allah byoffering a sacrifice and giving charity, and
performing this ritual in front of one's family andchildren, and
keeping this ritual alive among the people, because the sacrifice is
one of the symbols of Islam.
Ibn al-Qayyim said in Tuhfat al-Mawdood (p. 65):
Sacrifice at the appropriate time, such as during Hajj and on
Eidal-Adha, is better than giving its price in charityeven if one
gives more, because offering a sacrifice and shedding blood is what is
required, and it is an act of worship that is mentioned alongside
prayer, as Allah says (interpretation of the meaning):
"Therefore turn in prayer to your Lord and sacrifice (to Him only)"
[al-Kawthar: 108:2]
"Say (O Muhammad): Verily, my salaah (prayer), my sacrifice, myliving,
and my dying are for Allâh, the Lord of the 'Alameen (mankind, jinn
and all that exists)"
[al-An'aam 6:162].
In every religion there is prayer and sacrifice and no other acts of
worship could take their place. Hence if you give charityequivalent to
many times the price of the sacrifice offered in Hajj, it can never
take its place. The same is true of udhiyah (qurbaani). End quote.
The scholars of the Standing Committee for Issuing Fatwas said:
Offering the udhiyah (qurbaani) on the Muslim's behalf and on behalf
of the (living) members of his family is a confirmed Sunnah (Sunnah
mu'akkadah) for the one who is able to do it, and offering it isbetter
than giving its price in charity.
End quote from Fataawa al-Lajnah al-Daa'imah, 11/419
If this relative is sick and in urgent need of treatment and
medicine,then helping him in his sickness and striving to find
treatment for him takes precedence over udhiyah, especially if his
sickness is severe and heis in urgent need of help, and there is no
oneamong his relatives or friends who can help him.
'Abd al-Razzaaq narratedin al-Musannaf (8156) from al-Thawri, from
'Imraan ibn Muslim, fromSuwayd ibn Ghaflah thathe said: I heard Bilaal
say: To give its price (i.e.,the price of the udhiyah)in charity to an
orphan or a debtor is dearer to me than sacrificing it. He(the
narrator) said: I do not know whether Suwayd said it by himself or it
is the wordsof Bilaal.
Shaykh al-Islam Ibn Taymiyah (may Allah have mercy on him) said:
Hajj (i.e., voluntary Hajj) done in the prescribed manner is better
than charity that is not obligatory. But if he has relatives who are
in need, then giving charity to them is better,who need his charity
for his maintenance. But if both actions are voluntary, then Hajj is
better, because it is an act of worship that is both physical and
financial. By the same token, offering a sacrifice for 'aqeeqah or
udhiyah is better than giving its price in charity. End quote from
al-Fataawa al-Kubra, 5/382
Shaykh Ibn 'Uthaymeen (may Allah have mercy on him) said:
If it is a matter of choice between udhiyah and paying off debt on
behalf of a poor person, then paying off the debt is better,
especially if thedebtor is a relative.
End quote from Majmoo'Fataawa wa Rasaa'il Ibn 'Uthaymeen, 13/1496
And Allah knows best.