Deuteronomy 15 includes instructions for every seventh year, which is a year of remission of debt. This includes slavery and those who have been slaves are freed with some compensation. Moses insists that the people practice charity and compassion on those who are in need. They are to do so because when they were in slavery and God took care of them and freed them.
Deuteronomy 16 includes instructions regarding the yearly Passover, weeks and booths festivals. Of note is the fact that these may not be celebrated in the hometowns of the people. They must go to the place where God dwells in order to properly sacrifice and observe the holy days.
Psalm 34 was written about when David feigned madness in front of Achish in 1 Samuel 21, not Abimelech as noted in the scripture. It is an acrostic of the Hebrew alphabet using all but one of the letters. David speaks words of praise to the Lord. He recounts God’s protection and provision in times of need and exhorts the reader to love righteousness and to stay away from evil. Good advice.