John Mark
Mark 4:39ESV·traditional attribution

And he awoke and rebuked the wind and said to the sea, “Peace! Be still!” And the wind ceased, and there was a great calm.

Matthew Henry Presbyterian @wholebiblehenry

This miracle which Christ wrought for the relief of his disciples, in stilling the storm, we had before (Mat 8:23, etc.); but it is here more fully related. Observe, 1. It was the same day that he had preached out of a ship, when the even was come, Mar 4:35.

Commenting on Mark 4:35-41

Albert Barnes Presbyterian @notesbybarnes

Verse 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.

Adam Clarke Methodist @methodicalclarke

Peace, be still - Be silent! Be still! There is uncommon majesty and authority in these words. Who but God could act thus? Perhaps this salvation of his disciples in the boat might be designed to show forth that protection and deliverance which Christ will give to his followers, however violently they may be persecuted by earth or hell.