Albert Barnes on Mark 4:39

Peace, be still. There is something exceedingly authoritative and majestic in this command of our Lord. Standing amidst the howling tempest, on the heaving sea, and in the darkness of the night, by his own power he stills the waves, and bids the storm subside. None but the God of the storms and the billows could awe, by a word, the troubled elements, and send a universal peace and stillness among the winds and waves. He must, therefore, be Divine.

(m) "And the wind" Ps 89:9, Lam 3:31,32