24:2 The people - To the elders, by whom it was to be imparted to all the rest, and to as many of the people as came thither. He spake to them in God's name, and as from him, in the language of a prophet, Thus saith the Lord. Jehovah, the great God, and the God of Israel, whom you are peculiarly engaged to hear. The flood - Or, the river, namely, Euphrates, so called by way of eminency. They served - That is, Both Abraham and Nahor were no less idolaters than the rest of mankind. This is said to prevent their vain boasting in their worthy ancestors, and to assure them that whatsoever good was in, or had been done by their progenitors, was wholly from God's free grace, and not for their own merit or righteousness.

Joshua 24:2 Parallel Commentaries

And for Your Fearlessness against them Hold this Sure Sign -- Whenever There Is...
43. And for your fearlessness against them hold this sure sign--whenever there is any apparition, be not prostrate with fear, but whatsoever it be, first boldly ask, Who art thou? And from whence comest thou? And if it should be a vision of holy ones they will assure you, and change your fear into joy. But if the vision should be from the devil, immediately it becomes feeble, beholding your firm purpose of mind. For merely to ask, Who art thou [1083] ? and whence comest thou? is a proof of coolness. …
Athanasius—Select Works and Letters or Athanasius

Covenanting Performed in Former Ages with Approbation from Above.
That the Lord gave special token of his approbation of the exercise of Covenanting, it belongs to this place to show. His approval of the duty was seen when he unfolded the promises of the Everlasting Covenant to his people, while they endeavoured to perform it; and his approval thereof is continually seen in his fulfilment to them of these promises. The special manifestations of his regard, made to them while attending to the service before him, belonged to one or other, or both, of those exhibitions …
John Cunningham—The Ordinance of Covenanting

The First Commandment
Thou shalt have no other gods before me.' Exod 20: 3. Why is the commandment in the second person singular, Thou? Why does not God say, You shall have no other gods? Because the commandment concerns every one, and God would have each one take it as spoken to him by name. Though we are forward to take privileges to ourselves, yet we are apt to shift off duties from ourselves to others; therefore the commandment is in the second person, Thou and Thou, that every one may know that it is spoken to him, …
Thomas Watson—The Ten Commandments