ye blow:

A single alarm was a signal for the eastward division to march; two such alarms the signal for the south; and probably three for the west, and four for the North. There appears therefore, a deficiency in the Hebrew Text, which is thus supplied by the LXX:

και σαλπιειτε σημασιαν τριτην, και εξαρουσιν αι παρεμβολαι αι παρεμβαλλουσαι παρα θαλασσαν. και σαλπιειτε σημασιαν τεταρτην, και εξαρουσιν αι παρεμβολαι αι παρεμβαλλουσαι προς βομραν.
"And when ye blow a third alarm, or signal, the camps on the west shall march; and when ye blow a fourth alarm, the camps on the north shall march." This addition, however, is not acknowledged by the Samaritan, nor any other version than the Coptic, nor any manuscript yet collated.