Yahweh's Book of Laws
Num 15:38 (ESV) “Speak to the people of Israel, and tell them to make tassels (tzitzit) on the corners of their garments (Holy Garments) throughout their generations, and to put a cord of blue on the tassel (tzitzit) of each corner.
Matthew Henry Commentaries
Hebrews are ordered to make fringes upon the borders of their garments, which were to be memorandums to them of their duty, that they might not sin through forgetfulness.
The sign appointed is a fringe of linen, or thread, or worsted, or the garment itself ravelled at the bottom, and a blue riband bound on the top of it to keep it tight, Num_15:38.
The Hebrews being a peculiar people, they were thus distinguished from their neighbours in their dress, as well as in their diet, and taught by such little instances of singularity not to be conformed to the way of the heathen in greater things.
Thus likewise they proclaimed themselves Hebrews wherever they were, as those that were not ashamed of Yahweh and His law. Our Saviour, being made under the law, wore these fringes; hence we read of the hem or border, of His garment, Mat_9:20.