It is narrated from Sayyiduna Ma'qil bin Yasar (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Act upon the Qur'an: regard its lawful as lawful and its unlawful as unlawful, follow it, and do not deny anything of it. Whatever of it becomes doubtful to you, refer it back to Allah and to the people of knowledge after me, who will inform you. Believe in the Torah, the Injil, the Zabur and what the prophets were given from their Lord. The Qur'an and what is in it is sufficient for you, for it is an intercessor whose intercession will be accepted, and its lawful things have been confirmed. Beware! Every verse will be a light on the Day of Resurrection. I have been given Surah al-Baqarah from the first remembrance; I have been given Ta Ha and the surahs that begin with Ta Sin and Ha Mim from the Tablets of Musa (peace be upon him); and I have been given Surah al-Fatihah from beneath the Throne."
Ubaydullah bin Abi Humayd has been criticised (by the scholars of hadith).
Imam al-Shafi'i (may Allah have mercy on him) said: Allah made lawful the food of the People of the Book, and according to the people of tafsir this means their slaughtered animals; He did not except anything from them. So it cannot be that the slaughtered animal of a person of the Book is lawful while something in that slaughtered animal is unlawful for every Muslim, from what had been made unlawful for the People of the Book before the Prophet (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19706