City of Palm Trees

Deuteronomy 34:3
3 And the south, and the plain of the valley of Jericho, the city of palm trees, unto Zoar.
KJV
The city of palm trees is Jericho as described in 2 Chronicles 28:15 below.
2 Chronicles 28:15
15 And the men which were expressed by name rose up, and took the captives, and with the spoil clothed all that were naked among them, and arrayed them, and shod them, and gave them to eat and to drink, and anointed them, and carried all the feeble of them upon asses, and brought them to Jericho, the city of palm trees, to their brethren: then they returned to Samaria.
KJV