Buying a share (in an animal) for the udhiyah, sharing with one who wants to offer a wedding feast, and the minimum amount that is required for the wedding feast
Question

                We have some relatives who are going to slaughter a cow on the second day of Eid for a wedding feast (waleemah). Is it permissible for us to share that with them, with the intention of following the Sunnah of offering a sacrifice (udhiyah)? Will we attain the full reward by doing that?
Praise be to Allah.
	Firstly:

	The wedding 
	feast (waleemah) may be done by offering any kind of food to those who 
	attend, even if it is made of barley.

	In al-Mawsoo‘ah 
	al-Fiqhiyyah (45/250) it says:

	The Hanafi, 
	Maaliki, Shaafa‘i and Hanbali fuqaha’ are of the view that there is no 
	minimum requirement for the wedding feast, and the sunnah (of offering a 
	wedding feast) may be fulfilled by offering any kind of food, even if it is 
	two mudds of barley, because of the saheeh hadith: The Prophet (blessings 
	and peace of Allah be upon him) gave a wedding feast of two mudds of barley 
	when he married one of his wives.

	‘Iyaad stated 
	that there was scholarly consensus on the fact that there is no minimum 
	requirement for the wedding feast, and that whatever food is offered, the 
	sunnah is fulfilled.

	The Shaafa‘is 
	said: The minimum requirement for the wedding feast, in the case of one who 
	can afford it, is a sheep; for others it is whatever they can afford. That 
	is because of the report which says that the Prophet (blessings and peace of 
	Allah be upon him) said to ‘Abd ar-Rahmaan ibn ‘Awf when he got married: 
	“Give a wedding feast, even if it is with a sheep.”

	An-Nashaa’i 
	said: What is meant is that the minimum for one who wants to offer a proper 
	feast is a sheep, because it is says in at-Tanbeeh: Whatever food is 
	offered as a wedding feast, it is acceptable. That includes food and drinks 
	that are made at the time of doing the marriage contract, such as sweets and 
	other kinds of food, even if the man is well off. 

	A number of 
	Hanbalis stated that it is recommended (mustahabb) that the wedding feast be 
	no less than a sheep.

	Az-Zarkashi 
	said: The Prophet (blessings and peace of Allah be upon him) said, “… even 
	if it is with a sheep”, and the mention of a sheep here – and Allah knows 
	best – refers to a small amount; in other words, even with something small, 
	like a sheep.

	Al-Mirdaawi 
	said: From this it may be understood that it is permissible to offer a 
	wedding feast with less than a sheep, and from the first hadith it may be 
	understood that one may offer more than a sheep, because he regarded that as 
	being little. End quote.

	Secondly:

	With regard to 
	the udhiyah, one-seventh of a camel or one-seventh of a cow is acceptable, 
	as has been explained previously in the answer to question no.
	45757.

	Thirdly:

	It is 
	permissible to buy a share in a cow or camel, even if some of the 
	participants do not intend to offer an udhiyah; rather they want the meat 
	for a wedding feast, or to eat it, or sell it, and so on.

	An-Nawawi (may 
	Allah have mercy on him) said in al-Majmoo‘ (8/372): It is 
	permissible for seven people to share a camel or cow for the udhiyah, 
	whether all the participants are members of one household or otherwise, or 
	some of them simply want the meat; that is acceptable on the part of one who 
	wants to offer a sacrifice, and this applies whether it is a sacrifice in 
	fulfilment of a vow, or a voluntary sacrifice. This is our view, and it was 
	the view of Ahmad and the majority of scholars. End quote.

	Ibn Qudaamah 
	(may Allah have mercy on him) said in al-Mughni (13/363): A camel is 
	acceptable on behalf of seven people, as is a cow. This is the view of most 
	of the scholars. Then he quoted some hadiths which support that view, then 
	said:

	As this is 
	proven, then it makes no difference whether the participants are members of 
	one family or otherwise, or whether the sacrifice is obligatory or 
	voluntary, or whether some of them intend to offer a sacrifice and others 
	simply want the meat, because each of them is only accountable for his 
	share, and the intention of others has no impact on that. End quote.