Hajj - Slaughtering on Behalf of Others (Hadith No. 1467)

Hadith no. 1466 (below) is a repeat. Read it here.
Volume 2, Book 26, Number 766:
Narrated Nafi':
Ibn 'Umar (radiallaahu `anhu) intended to perform Hajj in the year of the Hajj of Al-Harawriya during the rule of Ibn Az-Zubair. Some people said to him, "It is very likely that there will be a fight among the people, and we are afraid that they might prevent you (from performing Hajj)." He replied, "Verily, in Allah's Apostle (sallallaahu `alayhi wasallam) there is a good example for you (to follow). In this case I would do the same as he had done. I make you witness that I have intended to perform 'Umra." When he reached Al-Baida', he said, "The conditions for both Hajj and 'Umra are the same. I make you witness that I have intended to perform Hajj along with 'Umra." After that he took a garlanded Hadi (to Mecca) which he bought (on the way). When he reached (Mecca), he performed Tawaf of the Ka'ba and of Safa (and Marwa) and did not do more than that. He did not make legal for himself the things which were illegal for a Muhrim till it was the Day of Nahr (sacrifice), when he had his head shaved and slaughtered (the sacrifice) and considered sufficient his first Tawaf (between Safa and Marwa), as a (Sa'i) for his Hajj and 'Umra both. He then said, "The Prophet (sallallaahu `alayhi wasallam) used to do like that."

Today's Hadith:

Volume 2, Book 26, Number 767:
Narrated 'Amra bint 'AbdurRahman:
I heard 'Aisha (radiallaahu `anhaa) saying, "Five days before the end of Dhul-Qa'ada we set out from Medina in the company of Allah's Apostle (sallallaahu `alayhi wasallam) with the intention of performing Hajj only. When we approached Mecca, Allah's Apostle (sallallaahu `alayhi wasallam) ordered those who had no Hadi with them to finish their lhram after performing Tawaf of the Ka'ba and (Sa'i) and between Safa and Marwa." 'Aisha (radiallaahu `anhaa) added, "On the day of Nahr (slaughtering of sacrifice) beef was brought to us. I asked, 'What is this?' The reply was, 'Allah's Apostle (sallallaahu `alayhi wasallam) has slaughtered (sacrifices) on behalf of his wives.' "
Prophet (sallallaahu `alayhi wasallam) slaughtered the animals (hadiy) on behalf of his wives. Does it apply on wives only or can one slaughter the hadiy on behalf of anyone? I'll update this post once I have the answer inshaAllah.