Job 41:32

He maketh a path to shine after him
Upon the sea, by raising a white from upon it, through its vehement motion as it passes along, or by the spermaceti it casts out and leaves behind it. It is said ^F19 that whales will cut and plough the sea in such a manner, as to leave a shining glittering path behind them, the length of a German mile, which is three of ours;

[one] would think the deep [to be] hoary;
to be old and grey headed, or white like the hair of the head of an old man, a figure often used of the sea by poets ^F20; and hence "Nereus" ^F21, which is the sea, is said to be an old man, because the froth in the waves of it looks like white hair.