אֵלֶּה הַדְּבָרִים אֲשֶׁר דִּבֶּר מֹשֶׁה אֶל־כָּל־יִשְׂרָאֵל בְּעֵבֶר הַיַּרְדֵּן בַּמִּדְבָּר בָּעֲרָבָה מוֹל סוּף בֵּין־פָּארָן וּבֵין־תֹּפֶל וְלָבָן וַחֲצֵרֹת וְדִי זָהָב:
In Deuteronomy 1:1, we are faced with one of the most puzzling verses of the Bible. 

 These are the words which Moses spoke unto all Israel beyond the Jordan; in the wilderness, in the Arabah, over against Suph, between Paran and Tophel, and Laban, and Hazeroth, and Di-zahab.

Moses spoke to Israel beyond the Jordan in all of these places? Furthermore, a number of these places sound like places Israel has been to previously. They've been in the "wilderness," "mol suph (opposite the Red Sea possibly)," and they had already encamped in a place called "Hazeroth" (Numbers 33:17). Additionally, Moses spoke to them in all of these places? It seems as though this long speech occurs at one time and in one place. Many have been confused about the exact geographic destination of the nation at this point of its history. 

HaRav Naphtali Zvi Yehuda Berlin, also known as the Netziv, answers this question in a simple, yet satisfying way. He suggests that Moses' speech did not take place at one time and in one place but rather at different gatherings of the people. The locations mentioned in the text, suggests the Netziv, are all different cities in the area known as "beyond the Jordan river." Each gathering took place at these spots. Once in "midbar," "arabah," "mol suph," "between Paran and Tophel", "Laban," "Hazeroth," and "Di-Zahab." 

But why travel to all of these different cities? It seems as though the nation is stationed in one spot.

The Netziv then continues his answer by comparing the encampments of the nation in the desert and the encampments beyond the Jordan. He suggests that in the desert the nation all settled in one place according to each tribes' flag. making a gathering relatively simple. Beyond the Jordan, however, the nation spread out to many different cities, such as the ones listed in the text. These cities were conquered in the wars with Sihon and Og. Only the Holy Ark rested in one place. This information answers the question. Moses gave speeches numerous times not all in one place. He traveled to all of these different cities to address the nation.

The nation was stationed in the general area of "beyond the Jordan" but they had spread out to the newly conquered cities. The Netziv, through his simple answers, satiates the minds of all those who were bewildered by this verse. Thank you Netziv.