Sahih Muslim 1966 c
Shu'ba reported:
Qatada informed me that he had heard Anas saying that Allah's Messenger (may peace be npon him) sacrificed (the horned rams) and like that. I said: Did you (Qatada) hear from Anas? He said. Yes.
وَحَدَّثَنَا يَحْيَى بْنُ حَبِيبٍ، حَدَّثَنَا خَالِدٌ، - يَعْنِي ابْنَ الْحَارِثِ - حَدَّثَنَا شُعْبَةُ، أَخْبَرَنِي 
 قَتَادَةُ، قَالَ سَمِعْتُ أَنَسًا، يَقُولُ ضَحَّى رَسُولُ اللَّهِ صلى الله عليه وسلم ‏.‏ بِمِثْلِهِ ‏.‏ قَالَ قُلْتُ
 آنْتَ سَمِعْتَهُ مِنْ أَنَسٍ قَالَ نَعَمْ ‏.‏