Isaiah 63:2

“Wherefore art thou red in thy apparel, &c.] Christ having satisfied the church as to her first question, concerning his person, who he was; she puts a second to him, about the colour of his garments, which was red, and the reason of it. His garments at his transfiguration were white as snow, whiter than any fuller on earth could whiten them; his robe of righteousness is fine linen, clean and white; the garment of his human nature, or his form as man, was white and ruddy; but this, through his bloody sufferings, became red, being all over bloody through the scourges he received, the crown of thorns he wore, the piercing of his hands, feet, and sides, with the nails and spear; but here it…”

“The prophet asks why His garments are "dyed" and "red." winefat--rather, the "wine-press," wherein the grapes were trodden with the feet; the juice would stain the garment of him who trod them (Rev 14:19-20; Rev 19:15). The image was appropriate, as the country round Bozrah abounded in grapes. This final blow inflicted by Messiah and His armies (Rev 19:13-15) shall decide His claim to the kingdoms u surped by Satan, and by the "beast," to whom Satan delegates his power. It will be a day of judgment to the hostile Gentiles, as His first coming was a day of judgment to the unbelieving Jews.”

“Wherefore art thou red? - The inquiry of the people. Whence is it that that gorgeous apparel is stained with blood? And thy garment like him that treadeth in the wine-fat? - Or rather the ‘wine-press.’ The word used here (גת gath) means the place where the grapes were placed to be trodden with the feet, and from which the juice would flow off into a vat or receptacle. Of course the juice of the grape would stain the raiment of him who was employed in this business, and would give him the appearance of being covered with blood. ‘The manner of pressing grapes,’ says Burder, ‘is as follows: having placed them in a hogshead, a man with naked feet gets in and tread the grapes; in about an hour’s…”

“63:2 The term red (Hebrew ’adom) is a wordplay on the name Edom.”

“The seer surmises this also, and now inquires still further, whence the strange red colour of his apparel, which does not look like the purple of a king's talar or the scarlet of a chlamys. "Whence the red on thine apparel, and thy clothes like those of a wine-presser?" מדּוּע inquires the reason and cause; למּה, in its primary sense, the object or purpose. The seer asks, "Why is there red ('âdōm, neuter, like rabh in Isa 63:7) to thine apparel?" The Lamed, which might be omitted (wherefore is thy garment red?), implies that the red was not its original colour, but something added (cf., Jer 30:12, and lâmō in Isa 26:16; Isa 53:8). This comes out still more distinctly in the second half…”