עזרא, פרק ד׳, פסוק כ׳

A search through ancient historical records brought to light the impressive and glorious past of Jerusalem. Far from being a small, insignificant province, the city was once the heart of a vast empire. These archives revealed the golden era of the Israelite monarchy, a time when its power stretched across massive territories from the northern border of Syria all the way to Egypt [ביאור שטיינזלץ]. This historical discovery directly validated the warning sent to the reigning monarch: if Jerusalem were to be rebuilt, he faced the real danger of losing both his control and his revenues throughout the entire region [מלבי"ם].

During this peak era, exceptionally strong and great kings, such as David and Solomon, ruled from Jerusalem [רש"י, ר' סעדיה גאון]. Their dominance was deeply tied to their spiritual state; during times when the Israelites faithfully followed the will of God, surrounding nations naturally submitted to their authority and paid them tribute [ר' סעדיה גאון]. The dominion of these Israelite kings expanded widely, covering the entire region across the river that leads toward the Land of Israel [רש"י].

As a clear sign of their submission, neighboring peoples supplied the Israelite kings with various gifts and financial tributes [רלב"ג]. The wealth flowing into the capital consisted of three primary categories of taxation. The first included general, fixed taxes that served as the standard portion owed to the king [מצודת דוד, ר' סעדיה גאון]. The second was a personal poll tax, collected from every individual [רש"י, ר' סעדיה גאון, ביאור שטיינזלץ]. Regarding the third category, there are different understandings of its exact nature. Some explain that it functioned as a toll collected for the use of the regional roads [ביאור שטיינזלץ], while others suggest it was an agricultural and property tax, functioning much like a modern property tax [ר' סעדיה גאון].