פירוש על מלכים א 5:28

In shifts. As he concludes and says, “they will be a month in Levanon.” When the ten thousand men were in Levanon in Tishrei and the twenty thousand men were at home in Mar Cheshvan, the second ten thousand would alternate and go out to Levanon and these would return to their home[s]. And in Kislev the third ten thousand would go out to Levanon, and these [second ones] would return to their home[s]. And in Teiveis the first ones go out and return to Levanon, and thus they would continue the cycle, which resulted that each ten thousand among them spent one month in Levanon and two months at home.

In charge of the tax. To collect it.