In between the gospel of Mark and the gospel of Luke we read two Psalms and two chapters of Deuteronomy.
Psalm 16, of David. A wonderful psalm of confidence in the LORD even in times of trouble. This is a prophetic psalm pointing to Jesus resurrection, it is quoted in the New Testament.
Psalm 17 demonstrates David’s total trust in God and not in self in spite of David’s best efforts. It can be summarized: “Keep me as the apple of Your eye;
Hide me under the shadow of Your wings” with regard to the threats from David’s enemies.
Deuteronomy 14, do not do as the heathen do with improper mourning, eat only clean meat and do not boil a young goat in its mother’s milk. Observe tithing, and every three years give an extra tithing for the Levites, the aliens, the fatherless and the widows.
Deuteronomy 15. Debts are to be canceled after seven years, show generosity to the poor, lend freely but do not borrow, free your slaves after seven years and give them opportunity to continue on their own. Set apart every firstborn animal.