So others know what is being talked about I am inserting a picture of the versal (ie the ornate capital letter):
The transcription is as follows:
Ihs autem dixitei egosum et vi
debitis filium hominis seden
tem adextris virtutas et venientem cu
It is from the 26th Chapter of Matthew and says:
Jesus however said to them "I am" and you will see the Son of Man sitting at the right hand of the Almighty and coming on the clouds of heaven.
Note that it is the Vulgate, so you can always find an approximate transcript by referring to standard editions of the Vulgate, although there will be minor differences and alterations. For example in the usual Vulgate it gives either "virtutis Dei" or just "virtutis" but in the Book of Kells it says "virtutas".