Commentary for Genesis 13:10

כי כלה משקה THAT IT WAS WELL WATERED — a land of water-streams.

AS THE GARDEN OF THE ETERNAL, LIKE THE LAND OF EGYPT. The verse states that the whole land of the Plain was adequately irrigated from the Jordan by working with the foot, just as was done with the garden of G-d, concerning which it is stated, And a river went out of Eden to water the garden,¹⁰³Above, 2:10. and as is the way in the land of Egypt, concerning which it is stated, And thou didst water it with thy foot.¹⁰⁴Deuteronomy 11:10. The verse mentions both places: it says that the land of the Plain was as adequately irrigated as the garden of the Eternal, which is the most perfect place on this earth, and it also mentions, like the land of Egypt, a place well known for pasture.
Our Rabbis have said,¹⁰⁵Sifre Ekev, 38. The Sifre is a Tannaitic Midrash on the book of Numbers and the book of Deuteronomy. “As the garden of the Eternal for trees; Like the land of Egypt — for herbs.” Their intent was to explain that there were large rivers in the Plain, which watered the trees of the gardens, as was the case in the garden of G-d, and that there were also ponds in it, as in the land of Egypt, from which vegetable gardens were watered. Lot chose this part, for a land which is so irrigated is unlikely to suffer from a drought and is good for pasture.

וישא לוט את עיניו, from the mountain where they were staying, as we know from 12,8. Seeing that this was a high point in the country, it afforded Lot an opportunity to survey much of the rest of the country all around him. As a result, he observed כי כלה משקה, that the Jordan valley was very well irrigated. When the Torah uses the word כלה after having already said כל when describing the valley, this is a way of emphasising the word כל still further. We find a similar construction in Isaiah 14,18 כל מלכי גוים כולם, “all the kings of the nations, all of them.”