Imam al-Shafi'i (may Allah have mercy on him) said: This will suffice, because the Prophet (peace and blessings be upon him) slaughtered some of the sacrificial animals himself and had others slaughter some of them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19163
Sayyiduna Jabir (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) slaughtered some of his sacrificial animals with his own hand and had others slaughter some of them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19163
Abd al-Rahman bin al-Qasim narrates from his father, who narrates from Sayyidah Aishah (may Allah be pleased with her), that the Messenger of Allah (peace and blessings be upon him) sacrificed a cow on behalf of his wives.
Imam al-Shafi'i (may Allah have mercy on him) said: He (peace and blessings be upon him) sent sacrificial animals (hady), and it was only the one with whom he sent them who slaughtered them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19164
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said that Dhu'ayb Abu Qabisah said that the Prophet (peace and blessings be upon him) used to send sacrificial camels with him and would say: "If any of them becomes exhausted and you fear it will die, slaughter it, then dip its sandal in its blood and strike its side with it, but do not eat of it yourself, nor feed any of your companions."
Imam al-Shafi'i (may Allah have mercy on him) said: However, I dislike that a polytheist should slaughter any of the sacrificial animals.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19165
Abu Zabyan (may Allah have mercy on him) narrates from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he disliked that a Jew or a Christian should slaughter the sacrifice of a Muslim.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19167
Qabus bin Abi Zabyan narrates from his father that Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: None but a Muslim should slaughter your sacrifice, and when he slaughters, say: 'Bismillah, Allahumma minka wa laka' (In the name of Allah; O Allah, it is from You and for You). O Allah, accept it from so-and-so.
Imam al-Shafi'i (may Allah have mercy on him) said: If a polytheist whose slaughtered animal is lawful slaughters the sacrifice, it is valid, though I dislike it.
Al-Shaykh (may Allah have mercy on him) said: That is because their slaughtered animals are also lawful.
(b) Ata bin Abi Rabah (may Allah have mercy on him) said: There is no harm in it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19168