‘Thus did the children of Israel. According to all that Yahweh commanded Moses, so they encamped by their standards, and so they set forward, every one by their families, according to their fathers' houses.'
Again it is stressed that Israel did exactly as Yahweh had commanded Moses (compare for the phrase Exodus 12:50; Exodus 16:34; Exodus 39:1; Exodus 39:5; Exodus 39:7; Exodus 39:21 and often; Leviticus 8:9; Leviticus 8:13 and often; Leviticus 16:34; Leviticus 24:23). At this stage they were fully obedient. They encamped by their standards (or in their ranks), and that is how they set forward, every one by their ‘families', and according to their clans/tribes.
This emphasis reminds us that above all what God requires of us is obedience. As Jesus reminded us, it is no good saying ‘Lord' Lord', if we do not do the things that He says (Matthew 7:21).