Reference for Menachot 75:3
<br><br><big><strong>הדרן עלך הקומץ</strong></big><br><br>
<big><b>MISHNAH: </b></big>THE [ABSENCE OF THE] BLUE [IN THE FRINGES] DOES NOT INVALIDATE THE WHITE, NEITHER DOES THE [ABSENCE OF THE] WHITE INVALIDATE THE BLUE<span class="x" onmousemove="('comment',' There should be, according to law, four threads inserted in each of the four corners of the garment, two white and two blue (or, three white and one blue) ; nevertheless the absence of one colour is of no consequence provided there was the proper number of threads in all. Consequently it is valid if there were four blue threads, or four white threads.');"><sup>3</sup></span> THE [ABSENCE OF THE] HAND-TEFILLAH DOES NOT INVALIDATE THE HEAD-TEFILLAH, NEITHER DOES THE [ABSENCE OF THE] HEAD-TEFILLAH INVALIDATE THE HAND-TEFlllah.<span class="x" onmousemove="('comment',' And if a man has only one tefilah (sing. of tefillin) he should put on that one.');"><sup>4</sup></span>