Numbers 15:39

“And it shall be unto you for a fringe, etc.] The blue ribbon or lace shall be in or upon the fringe to fasten it: that ye may look upon it; the blue lace making the whole the more conspicuous: from hence the Jews gather, that the night is not the time for wearing fringe, which lessens the sight, and it is not so easily seen; and that night garments are not obliged to have the fringe on them; and yet, they say, a blind man is bound to wear it, because, though he cannot see it, others can f218: and remember all the commandments of the Lord, and do them: this is the general use, end, and design of the fringes, that upon sight of them they might be put in mind of the commandments and put upon…”

“For a fringe - That is, the ribband, shall be unto you, shall serve you for a fringe, to render it more visible by its distinct colour, whereas the fringe without this was of the same piece and colour with the garment, and therefore less observeable. That ye seek not - Or, enquire not for other rules and ways of serving me than I have prescribed you. Your own heart, and eyes - Neither after the devices of your own hearts, as Nadab and Abihu did when they offered strange fire; nor after the examples of others which your eyes see, as you did when you were set upon worshipping a calf after the manner of Egypt. The phylacteries worn by the Pharisees in our Lord's time, were a different thing…”

“remember: Exo 13:9; Deu 6:6-9, Deu 11:18-21, Deu 11:28-32; Pro 3:1 ye seek not: Deu 29:19; Job 31:7; Pro 28:26; Ecc 11:9; Jer 9:14; Eze 6:9 go a whoring: Exo 34:15, Exo 34:16; Psa 73:27, Psa 106:39; Hos 2:2; Jam 4:4 Numbers 15:40”

“"And it shall be to you for a tassel," i.e., the fastening of the tassel with the dark blue thread to the corners of your garments shall be to you a tassel, "that ye, when ye see it, may remember all the commandments of Jehovah, and do them; and ye shall not stray after your hearts and your eyes, after which ye go a whoring." The zizith on the sky-blue thread was to serve as a memorial sign to the Israelites, to remind them of the commandments of God, that they might have them constantly before their eyes and follow them, and not direct their heart and eyes to the things of this world, which turn away from the word of God, and lead astray to idolatry (cf. Pro 4:25-26). Another reason for…”