Sahifah Hammam ibn Munabbih
Sahifah Hammam ibn Munabbih is sometimes quote as one of the earliest known hadith collections, that are still extant today by 8th century scholar Hammam ibn Munabbih. It has been translated, in the 20th century, by Muhammad Hamidullah. Two copies of Sahifa Hammam bin Munabbah manuscript were discovered; one in a Damascus library and the other in a library in Berlin. Dr. Hamidullah published it after carefully comparing the two manuscripts.
The view holding the sahifah of Hammam ibn Munabbih being very early has, however, been disputed. 
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- "It would appear that ‘the Sahīfah of Hammām’ is more properly the Sahīfah of ‘Abd al-Razzāq, and a thoroughly ninth-century work." Morris in his blog sums up the arguments for positioning he collection to the 9th century