John Wesley on Leviticus 10:6

Uncover not your head - That is, give no signification of your sorrow; mourn not for them; partly lest you should seem to justify your brethren, and tacitly reflect upon God as too severe; and partly lest thereby you should be diverted from, or disturbed in your present service, which God expects to be done chearfully. But bewail the burning - Not so much in compassion to them, as in sorrow for the tokens of divine displeasure.