25 Therefore at that time also, changed into all forms, it served your all-nourishing bounty, according to the desire of those who had need, 26 so that your children, whom you loved, O Lord, might learn that it is not the production of crops that feeds humankind but that your word sustains those who trust in you. 27 For what was not destroyed by fire was melted when simply warmed by a fleeting ray of the sun, 28 to make it known that one must rise before the sun to give you thanks, and must pray to you at the dawning of the light; 29 for the hope of an ungrateful person will melt like wintry frost, and flow away like waste water.

From when does one recite Shema in the morning? From when a person can distinguish between sky-blue [tekhelet] and white. Rabbi Eliezer says: From when one can distinguish between sky-blue and leek-green. And one must finish reciting Shema until the end of the period when you rise, i.e., sunrise, when the sun begins to shine. Rabbi Yehoshua says: One may recite the morning Shema until three hours of the day, which this is still considered when you rise, as that is the habit of kings to rise from their sleep at three hours of the day. While there is a set time frame for the recitation of Shema, one who recites Shema from that time onward loses nothing. Although he does not fulfill the mitzva of reciting of Shema at its appointed time, he is nevertheless considered like one who reads the Torah, and is rewarded accordingly.