(10) باب طَلَبِ الْكَافِرِ الْفِدَاءَ بِمِلْءِ الأَرْضِ ذَهَبًا
Anas reported this hadlth through another chain of transmitters and the words are:
" It would be said to him: You have told a lie; what had been demanded from you was quite easier than this (the belief in the Oneness of Allah)."
Reference: Sahih Muslim 2805 d
In-book reference: Book 52, Hadith 40
USC-MSA web (English) reference(deprecated numbering scheme): Book 39, Hadith 6736