'Yourselves' in the Bible

Be washed, make yourselves clean; put away the evil of your doings from before my eyes; let there be an end of sinning;

Go into a hole in the rock, covering yourselves with dust, in fear of the Lord, before the glory of his power.

See, all you who make a fire, arming yourselves with burning branches: go in the flame of your fire, and among the branches you have put a light to. This will you have from my hand, you will make your bed in sorrow.

Have I given orders for such a day as this? a day for keeping yourselves from pleasure? is it only a question of the bent head, of putting on haircloth, and being seated in the dust? is this what seems to you a holy day, well-pleasing to the Lord?