Psalm 5.9
Septuagint

oti ouk estin en tw stomati autwn alhqeia:  h kardia autwn mataia: 
tafoV anewgmenoV o larugx autwn:  
taiV glwssaiV autwn edoliousan

New Testament - Romans 3.13



tafoV anewgmenoV o larugx autwn, 
taiV glwssaiV autwn edoliousan
ioV aspidwn upo ta ceilh autwn

Septuagint

For their is no truth in their mouth; their heart is vain; their throat is an open sepulchre; with their tongues they have used deceit

New Testament

Their throat is an open sepulchre; with their tongues they have used deceit; the poison of asps is under their lips

Masoretic Text

For their is no faithfulness in their mouth; their inward part is very wickedness; their throat is an open sepulchre; they flatter with their tongue

Comments:  The MT does not include the thought of deceit explicitly.