'Forefathers' in the Bible

And it came to pass after three days, that he called together those who were the chief of the Jews; and when they had come together he said to them, Brethren, I having done nothing against the people or the customs of our forefathers, have been delivered a prisoner from Jerusalem into the hands of the Romans,

I am thankful to God, whom I serve from my forefathers with pure conscience, how unceasingly I have the remembrance of thee in my supplications night and day,