It is written

It is written

Every single time a New Testament author says "This is what is written", he goes ahead to quote a statement from the Old Testament.

See Matthew 2:5-6

Matthew 4:4

Matthew 4:6

Matthew 4:7

Matthew 4:10

Matthew 11:10

Matthew 21:13

Matthew 26:31

Mark 1:2

Mark 7:6-7

Mark 11:17

Mark 14:27

Luke 2:23

Luke 3:4-6

Luke 4:4

Luke 4:8

Luke 4:10-11

Luke 7:27

Luke 19:46

Luke 20:17

Luke 22:37

John 2:17

John 6:31

John 6:45

John 12:14-15

Acts 13:33

Acts 15:17

Acts 23:5

Romans 1:17

Romans 2:24

Romans 3:4

Romans 3:12

Romans 4:17

Romans 8:36

Romans 9:13

Romans 9:33

Romans 10:15

Romans 11:8

Romans 11:27

Romans 12:19

Romans 14:11

Romans 15:3

Romans 15:9

Romans 15:21

1 Corinthians 11:19

1 Corinthians 1:31

1 Corinthians 2:9

1 Corinthians 3:19

1 Corinthians 9:9

1 Corinthians 10:7

1 Corinthians 14:21

1 Corinthians 15:45

1 Corinthians 15:54

2 Corinthians 4:13

2 Corinthians 48:15

2 Corinthians 9:9

Galatians 3:10

Galatians 3:13

Galatians 4:27

Hebrews 10:7

1 Peter 1:16