The going down of the sun, commencement of Shabbat.
Exodus 20:8-11 King James Version (KJV)
8 Remember the sabbath day, to keep it holy.
9 Six days shalt thou labour, and do all thy work:
10 But the seventh day is the sabbath of the Lord thy God: in it thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that is within thy gates:
11 For in six days the Lord made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the Lord blessed the sabbath day, and hallowed it.
A Psalm for the Sabbath.
Psalm 54 King James Version (KJV)
54 Save me, O God, by thy name, and judge me by thy strength.
2 Hear my prayer, O God; give ear to the words of my mouth.
3 For strangers are risen up against me, and oppressors seek after my soul: they have not set God before them. Selah.
4 Behold, God is mine helper: the Lord is with them that uphold my soul.
5 He shall reward evil unto mine enemies: cut them off in thy truth.
6 I will freely sacrifice unto thee: I will praise thy name, O Lord; for it is good.
7 For he hath delivered me out of all trouble: and mine eye hath seen his desire upon mine enemies.