The Origin of Morning Prayers

Since the vEdaas were not recorded at that time, the only way to teach them to the children of next generation was to make them listen to an adult reciting them again and again repeatedly. Children usually have very short attention spans, and when they are fully awake they would rather play than listen to a vEda recital. So, our ancestors found out that the only time they could reliably grab the attention of children was in the early morning when they are still in bed. So they decided that the best time for vEda recital is early morning. This has started the custom of vEda recital early every morning. This custom evolved into the practice of morning prayers in religious rituals.