Bamidbar/Numbers 15:37-41 is found in most prayerbooks at the third paragraph of Torah study after the Shema:
…Speak to the Israelite people and instruct them to make for themselves fringes on the corners of their garments through the ages; let them attach a chord of blue to the fringe at each corner….”
It is interesting to note that Mishkan T’filah [tent/sanctuary of prayer], the Reform movement’s new (2007) siddur, restores this passage, with the following explanation:
This text was omitted from many Reform prayer books when it was not customary for Reform Jews to don tallitot [prayer shawls, with fringes on the corners] for prayer. Now that many Reform Jews find meaning in this custom, Mishkan T’filah has restored the full paragraph as an optional recitation.
"A Song Every Day" 