Genesis 13:10

And Lot uplifted his eyes towards (the place of) fornication; and beheld all the plain of Jardena that it was altogether well watered, before the Lord in his wrath had destroyed Sedom and Amorah; a land admirable for trees, as the garden of the Lord, and for fruitage, as the land of Mizraim as thou goest up to Zoar.

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, and as is the way in the land of Egypt, concerning which it is stated, And thou didst water it with thy foot. 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,, 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.”

ככר, a valley; the word occurs in a similar sense in Kings I 7,46 בככר הירדן יצקם, “he had them cast in the valley of the Jordan.” This particular valley was very close to the city of Sodom and prior to that city’s destruction it was known as being “like a garden of G’d.” (19,25) The “garden” people used as the metaphor to describe is was the “garden of Eden.” We know that that garden had been irrigated by four rivers. Alternately, the comparison made here is to Egypt which is thoroughly irrigated by the river Nile.

באכה צוער, all the way to the town of Tzoar. The letter ה at the end of the word באכה, is used in the same way as the same letter in Samuel I 1,26 הנצבת עמכה, “who was standing next to you.” There are other examples of this type in the Holy Scriptures. The letter כ at the beginning of the word ככר is not something that has been added, as many commentators believe, but is similar to that same letter in Leviticus 27,2 בערכך, describing proximity to the priest in that instance, and proximity to the river in this instance. (compare Ibn Ezra on that verse) The Jordan valley was thoroughly irrigated all the way south to Tzoar.