Matthew 4:6-7

Matthew 4:6-7

[6] And  saith  unto him,  If  the Son  of God,  cast  thyself  down:  for  it is written,  his  angels  charge  concerning  and  in  their hands  up,  thou dash  foot  against  a stone.  [7] Jesus  said  unto him,  It is written  again,  not  tempt  the Lord  God. 

What is the context of Matthew 4:6-7?