Charles Ellicott Commentary 1 Chronicles 26:17

"Eastward were six Levites, northward four a day, southward four a day, and for the store-house two and two." — 1 Chronicles 26:17 (ASV)

Eastward were six Levites. —Literally, To the east the Levites were six; to the northward for the day four; to the southward for the day four; and to the Stores two two (i.e., two apiece, or two by two). We must supply for the day in the first clause, with the Septuagint.

Toward Asuppim two and two. —The storehouse appears to have had two doors, with two warders stationed at each.