Loops together with the taches were for the joining the curtains together, as appears from Exodus 26:11, which way of conjunction was most convenient for the often taking them down and setting them up. From the selvage, or from, or in the extremity, or end, or edge, Heb. lip. In the coupling, i.e. in the place where the two curtains are coupled together. And likewise the second curtain is to be made exactly like the first.
Related Commentaries of Exodus 26:4
Exodus 26:4
4 And thou shalt make loops of blue upon the edge of the one curtain from the selvedge in the coupling; and likewise shalt thou make in the uttermost edge of another curtain, in the coupling of the second.