en_tn/2sa/07/21.md

And what nation is like your people Israel, the one nation on earth whom you, God, went and rescued for yourself?

This question is asked to encourage the audience to think deeply about something they already know. AT: "There is no nation like your people Israel" (See: rc://en/ta/man/translate/figs-rquestion)

just as we have always heard

Here the "we" is referring to David and the nation of Israel.