1)
Why does it mention here that He increased their children?
1.
Malbim: This is why He increased the borders of their land - they needed a wide land 1 .
1
Bnei Gad and Bnei Reuven needed Eretz Sichon and Og due to their great flocks! Perhaps even without this, Hashem needed to add to the land to house the people. However, Eretz Yisrael expands when it has many residents (Gitin 57a)! (PF)
