Rashi on Exodus 15:12/רש"י על שמות ט״ו:י״ב

1נטית ימינך THOU INCLINEST THY RIGHT HAND — When the Holy One, blessed be He, inclines His hand the wicked cease to be and fall — because everything is held in His hand and consequently falls when He inclines it. Similarly it states, (Isaiah 31:3) “When the Lord inclineth His hand, he that helpeth shall stumble and he that is helped shall fall”. A parable: it may be compared to glass vessels held in a man’s hand: if he inclines his hand a little they fall and are shattered to pieces (cf. Mekhilta).

2תבלעמו ארץ THE EARTH SWALLOWED THEM — From this it may be gathered that they received the privilege of burial as a reward for having said, (Exodus 9:27) “The Lord is righteous” (Mekhilta).