In this manuscript

British Library, London, England
MS Cotton Cleopatra B.XIII

The origin of this manuscript was the scriptorium established at Exeter by Bishop Leofric and it was produced there during his episcopate, 1050-1072. The manuscript contains Old English homilies and a number of other short pieces, among which is the Old English version of the coronation oath reproduced here. Cotton Cleopatra may originally have been part of a larger manuscript and it seems likely that it was produced for the use of a bishop, possibly Leofric himself.

A fuller description of this manuscript is available at The Use and Production of English Manuscripts 1060 to 1220.