The princes digged the well - with their staves - This is not easily understood. Who can suppose that the princes dug this well with their staves? And is there any other idea conveyed by our translation? The word חפרו chapharu, which is translated they digged, should be rendered they searched out, which is a frequent meaning of the root; and במשענתם bemishanotham, which we render with their staves, should be translated on their borders or confines, from the root שען shaan, to lie along. With these corrections the whole song may be read thus: -

Spring up, O well! Answer ye to it.

The well, the princes searched it out.

The nobles of the people have digged it.

By a decree, upon their own borders

This is the whole of the quotation from what is called the book of the wars of the Lord. But see Dr. Kennicott's remarks at the end of this chapter.

Sihon would

Deuteronomy 2:30-32 But Sihon king of Heshbon would not let us pass by him: for the LORD your God hardened his spirit, and made his heart obstinate...

Deuteronomy 29:7,8 And when you came to this place, Sihon the king of Heshbon, and Og the king of Bashan, came out against us to battle...

Jahaz

Judges 11:20 But Sihon trusted not Israel to pass through his coast: but Sihon gathered all his people together, and pitched in Jahaz...

Isaiah 15:4 And Heshbon shall cry, and Elealeh: their voice shall be heard even to Jahaz: therefore the armed soldiers of Moab shall cry out...

Jeremiah 48:34 From the cry of Heshbon even to Elealeh, and even to Jahaz, have they uttered their voice, from Zoar even to Horonaim...

Messiah Suffering and Wounded for Us
Surely He hath borne our griefs, and carried our sorrows: ..... He was wounded for our transgressions, He was bruised for our iniquities: the chastisement of our peace was upon Him; and with His stripes we are healed. W hen our Lord was transfigured, Moses and Elijah appeared in glory and conversed with Him. Had we been informed of the interview only, we should probably have desired to know the subject of their conversation, as we might reasonably suppose it turned upon very interesting and important …
John Newton—Messiah Vol. 1

The Two Classes.
"Two men went up into the temple to pray."--Luke xvii. 10. I now want to speak of two classes: First, those who do not feel their need of a Saviour who have not been convinced of sin by the Spirit; and Second, those who are convinced of sin and cry, "What must I do to be saved?" All inquirers can be ranged under two heads: they have either the spirit of the Pharisee, or the spirit of the publican. If a man having the spirit of the Pharisee comes into an after-meeting, I know of no better portion …
Dwight L. Moody—The Way to God and How to Find It

Numbers
Like the last part of Exodus, and the whole of Leviticus, the first part of Numbers, i.-x. 28--so called,[1] rather inappropriately, from the census in i., iii., (iv.), xxvi.--is unmistakably priestly in its interests and language. Beginning with a census of the men of war (i.) and the order of the camp (ii.), it devotes specific attention to the Levites, their numbers and duties (iii., iv.). Then follow laws for the exclusion of the unclean, v. 1-4, for determining the manner and amount of restitution …
John Edgar McFadyen—Introduction to the Old Testament