In Numbers 28 and 29 God repeats the requirements for offerings each week, each month and on festival days. Each of the animals to be offered must be without blemish, no fault of any kind. Grain offerings and drink offerings are also offered. God also repeats His instruction regarding those days on which the people do not work. Moses tells the Israelites everything God commands.
You have probably figured this out already but while I am referring to God as God, the laws are given by YHWH. YHWH is the one who met with Moses in the burning bush and has been with him the entire time. YHWH is the personal name and personal aspect of God. He is the one who walked in the garden with Adam and Eve, and the one who spoke to the patriarchs. I believe that YHWH is the second person of the Trinity, who became Jesus of Nazareth and walked among us. He is the one who wants a personal relationship with us even now.
In Psalm 31 the writer seeks refuge in the Lord. He acknowledges that the Lord has provided protection in the past and asks that He continue to deliver him from his enemies. Because God has been faithful in the past he knows God will be faithful still. The writer encourages all who wait for the Lord to be strong and courageous.