Rashi on Numbers 11:2/רש"י על במדבר י״א:ב׳

1ויצעק העם אל משה AND THE PEOPLE CRIED UNTO MOSES — A parable! This may be compared to the case of an earthly king who was angry with his son, and the son went to a friend of his father and said to him, “Go and ask forgiveness for me from father!” (Sifrei Bamidbar 86).

2ותשקע האש THEN THE FIRE SANK — it sank on the very spot; because if it had turned along one of the sides of the camp it would gradually have rolled along the whole of that side (Sifrei Bamidbar 86).