and I advanced in the Jews’ religion beyond many of mine own age among my countrymen, being more exceedingly zealous for the traditions of my fathers.

I was advancing in Judaism beyond many of my contemporaries and was extremely zealous for the traditions of my fathers.

and I was advancing in Judaism above many equals in age in mine own race, being more abundantly zealous of my fathers' deliverances,

and advanced in Judaism beyond many [my] contemporaries in my nation, being exceedingly zealous of the doctrines of my fathers.