Deuteronomy 2:19

When you approach {the border of} the {Ammonites}, you shall not harass them, and you shall not get involved in battle with them, for I have not given the land of {the Ammonites} to you as a possession; because I have given it to the descendants of Lot [as] a possession.

Deuteronomy 2:9

And Yahweh said to me, 'You shall not attack Moab, and you shall not engage in war with them, for I will not give you any of his land [as] a possession; I have given Ar to the descendants of Lot [as] a possession.'

Genesis 19:36-38

And the two daughters of Lot became pregnant by their father.

Deuteronomy 2:5

Do not get involved in battle with them, for I will not give you any of their land, not even {a foot's breadth} [of it]; since I have given Mount Seir [as] a possession for Esau.

Judges 11:13-27

And the king of the {Ammonites} said to Jephthah's messengers, "Because Israel took my land from [the] Arnon up to the Jabbok and the Jordan when they came up from Egypt; so then, restore it peacefully."

2 Chronicles 20:10

And now, look, the people of Moab and Ammon and Mount Seir whom you did not allow Israel to come against when they came from Egypt, from whom they turned aside and did not destroy,

Treasury of Scripture Knowledge

Summary

And when thou comest nigh over against the children of Ammon, distress them not, nor meddle with them: for I will not give thee of the land of the children of Ammon any possession; because I have given it unto the children of Lot for a possession.

Bible References

General references

Deuteronomy 2:5
Do not get involved in battle with them, for I will not give you any of their land, not even {a foot's breadth} [of it]; since I have given Mount Seir [as] a possession for Esau.
Genesis 19:36
And the two daughters of Lot became pregnant by their father.
Judges 11:13
And the king of the {Ammonites} said to Jephthah's messengers, "Because Israel took my land from [the] Arnon up to the Jabbok and the Jordan when they came up from Egypt; so then, restore it peacefully."
2 Chronicles 20:10
And now, look, the people of Moab and Ammon and Mount Seir whom you did not allow Israel to come against when they came from Egypt, from whom they turned aside and did not destroy,