Adam Clarke's Commentary on the Bible - Numbers 10:6
When ye blow an alarm the second time - A single alarm, as above stated, was a signal for the eastward division to march; two such alarms, the signal for the south division; and probably three for the west division, and four for the north. It is more likely that this was the case, than that a single alarm served for each, with a small interval between them. The camps, or grand divisions of this great army, always lay, as we have already seen, to the east, south, west, and north: and here the... read more
Adam Clarke's Commentary on the Bible - Numbers 10:5
When ye blow an alarm - תרועה teruah , probably meaning short, broken, sharp tones, terminating with long ones, blown with both the trumpets at once. From the similarity in the words some suppose that the Hebrew teruah was similar to the Roman taratantara, or sound of their clarion. read more