Jamieson-Fausset-Brown on 2 Samuel 24:6
the land of Tahtim-hodshi--that is, the land lately acquired; namely, that of the Hagarites conquered by Saul (Ch1 5:10). The progress was northward. Thence they crossed the country, and, proceeding along the western coast to the southern extremities of the country, they at length arrived in Jerusalem, having completed the enumeration of the whole kingdom in the space of nine months and twenty days.
Adam Clarke on 2 Samuel 24:8
Nine months and twenty days - This was a considerable time; but they had much work to do, nor did they complete the work, as appears from Ch1 21:6; Ch1 27:24. William the Conqueror made a survey of all England, particularizing "how many hides or carucates the land is taxed at; whose it was in the time of his predecessor Edward; who the present owners and sub-tenants; what and how much arable land, meadow, pasture, and wood there is, how much in demesne, i.e., held and cultivated by the landowners; how much in tenantcy, and what number of ploughs it will keep; what mills and fisheries; how many sockmen, freemen, co-liberti, cotarii, bordarii, radmanni, radchenisters, villains, maid-servants,…
Read the whole note in the consoleJohn Gill on 2 Samuel 24:8
So when they had gone through all the land,.... Beginning at the east, and from thence to the north, and then going about to the west, came to the south, which finished their circuit:
they came to Jerusalem, at the end of nine months and twenty days: they were ten months wanting ten days in numbering the people; in which they seem to have been very expeditious.
Keil & Delitzsch on 2 Samuel 24:1-9
"Again the anger of Jehovah was kindled against Israel; and He moved David against them, saying, Go, number Israel and Judah." לחרות ... ויּסף points back to the manifestation of the wrath of God, which Israel had experienced in the three years' famine (2 Samuel 21). Just as that plague had burst upon the land on account of the guilt which rested upon the people, so the kindling of the wrath of God against Israel a second time also presupposes guilt on the part of the nation; and as this is not expressly pointed out, we may seek for it generally in the rebellions of Absalom and Sheba against the divinely established government of David. The subject to "moved" is Jehovah, and the words "again…