Hadith No: 1
Ahmad ibn Hanbal - Musnad al-Imam Ahmad ibn Hanbal
And from the Musnad of the Banu Hashim - Beginning of the Musnad of Abdullah ibn Abbas (ra)
Volume: (1) - Page Number: (217)
27845 - And he said: "May Allah curse so-and-so. They deliberately took the greatest day of Hajj and erased its adornment," and the adornment of Hajj is none other than the talbiyah.

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Reference: Musnad Ahmad Ibn Hanbal Book 1

Hadith No: 2
Ibn Abi Shaybah - Al-Kitab Al-Musannaf fi Al-Ahadith wal-Athar
Book of Hajj - Fasting on the Day of Arafah in Mecca
Volume: (4) - Page Number: (273)
5 - Abu Bakr said: Abu Bakr narrated to us, Ibn Aliyyah narrated to us from Ayub, who said: I do not know if he heard it from Sa'id ibn Jubayr or if he just reported it from him. He said: I passed by Ibn Abbas on Arafah while he was eating pomegranates, and he said: "The Messenger of Allah (peace be upon him and his holy progeny) broke his fast at Arafah, and Umm al-Fadl gave him milk, which he drank." And he said: "May Allah curseso-and-so! They have taken the days of Hajj and erased their beauty." And he added: "The beauty of Hajj is the talbiyah."

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Reference: Al-Musannaf Book 4