Genesis 25:12-18 and Matthew 16:5-12 (NIV)

Genesis 25:12-18
Ishmael's Sons
12  This is the account of the family line of Abraham’s son Ishmael, whom Sarah’s slave, Hagar the Egyptian, bore to Abraham.
13  These are the names of the sons of Ishmael, listed in the order of their birth: Nebaioth the firstborn of Ishmael, Kedar, Adbeel, Mibsam,
14  Mishma, Dumah, Massa,
15  Hadad, Tema, Jetur, Naphish and Kedemah.
16  These were the sons of Ishmael, and these are the names of the twelve tribal rulers according to their settlements and camps.
17  Ishmael lived a hundred and thirty-seven years. He breathed his last and died, and he was gathered to his people.
18  His descendants settled in the area from Havilah to Shur, near the eastern border of Egypt, as you go toward Ashur. And they lived in hostility toward all the tribes related to them.

Matthew 16:5-12
The Yeast of the Pharisees and Sadducees
5    When they went across the lake, the disciples forgot to take bread.
6    “Be careful,” Jesus said to them. “Be on your guard against the yeast of the Pharisees and Sadducees.”
7    They discussed this among themselves and said, “It is because we didn’t bring any bread.”
8    Aware of their discussion, Jesus asked, “You of little faith, why are you talking among yourselves about having no bread? 
9    Do you still not understand? Don’t you remember the five loaves for the five thousand, and how many basketfuls you gathered? 
10  Or the seven loaves for the four thousand, and how many basketfuls you gathered? 
11  How is it you don’t understand that I was not talking to you about bread? But be on your guard against the yeast of the Pharisees and Sadducees.” 
12  Then they understood that he was not telling them to guard against the yeast used in bread, but against the teaching of the Pharisees and Sadducees.