'Whom' in the Bible

I thank God, whom I serve with a clear conscience as my ancestors did, when I constantly remember you in my prayers night and day.

and that is why I suffer these things. But I am not ashamed, because I know the One I have believed in and am persuaded that He is able to guard what has been entrusted to me until that day.

And their word will spread like gangrene; Hymenaeus and Philetus are among them.

But as for you, continue in what you have learned and firmly believed. You know those who taught you,