Hear, Israel, the Lord is our God, the Lord is One.
(Blessed be the Name of His glorious kingdom forever and ever.)
The Shema is one of only two prayers that are specifically commanded in Torah (the other is Birkat Ha-Mazon -- grace after meals). It is the oldest fixed daily prayer in Judaism, recited morning and night since ancient times. It consists of three biblical passages, two of which specifically say to speak of these things "when you lie down and when you rise up." This commandment is fulfilled by including the Shema in the liturgy for Ma'ariv (evening services) and Shacharit (morning services). Traditional prayerbooks also include a Bedtime Shema, a series of passages including the Shema to be read at home before going to bed at night. (Source)
Eisav's "pledge" with God as an afterthought...