'Command' in the Bible

Of the tribe of Issachar, men who understood the times, with knowledge of what Israel should do, two hundred chiefs; and all their relatives were at their command;

And see, [you have] the divisions of the priests and Levites for all the service of God’s house, and every willing, skillful man will be with you in all the kinds of work for any kind of service. Also the officers and all the people will be entirely at your command.”