Sayyiduna Anas (may Allah be pleased with him) states that the Prophet (peace and blessings be upon him) said: "Which creation is the most wondrous in faith?" The people said: "The angels." the Prophet (peace and blessings be upon him) said: "How could the angels not believe?" The people said: "The Prophets." the Prophet (peace and blessings be upon him) said: "Revelation comes to the Prophets; how could they not believe?" The people said: "The Companions (may Allah be pleased with them)." the Prophet (peace and blessings be upon him) said: "The Companions are with the Prophets; how could they not believe? The most wondrous of people in faith will be those who come after you; they will find a book of revelation, believe in it and follow it. They will be the most wondrous of people (the narrator is unsure, or perhaps the words are:) of creation in faith."
Al-Bazzar recorded it; he says: As a hadith reported from Sayyiduna Anas (may Allah be pleased with him),
this report is gharib (rare). (Allamah al-Haythami says:) I say: Its chain contains a narrator, Sa'id bin Bashir, about whom there is a difference of opinion; some declared him thiqah (trustworthy) and others declared him da'if (weak). The rest of its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 16691