White Thread & Black Thread:-        

2: 187         Permitted to you on the night of the fasts is the approach to your wives.  They are your garments.  And ye are their garments.  Allah knoweth what ye used to do secretly among yourselves; but He turned to you and forgave you; so now associate with them and seek what Allah hath ordained for you and eat and drink until the white thread of dawn appear to you distinct from its black thread; then complete your fast till the night appears; but do not associate with your wives while ye are in retreat in the mosques.  Those are limits (set by) Allah; approach not nigh thereto.  Thus doth Allah make clear His signs to men that they may learn self-restraint.

       #195        Men and women are each other's garments: i.e., they are for mutual support, mutual comfort, and mutual protection, fitting into each other as a garment fits the body.  A garment also is both for show and concealment.  The question of sex is always delicate to handle: here we are told that even in such matters a clear, open, and honest course is better than fraud or self-deception.  The sex instinct is classed with eating and drinking, an animal thing to be restrained, but not to be ashamed of.  The three things are prohibited during the fast by day, but permitted after the fast is broken at night till the next fast commences#        

       *** These rules and regulations were plagiarized and adapted with some modifications from their originals in the Bible and Rabbinical teachings especially the hour when the fast starts as in-

Mishna Berakot I,2 " the beginning of the day is at the moment when one can but distinguish a blue thread from a white thread (Parts of the tsit tsit worn by religious male Jews)" 

       This cannot be just a striking coincidence.They are neither revolutionary nor new laws and ideas except of course to the pagan Arabs ***