Zechariah 8.16
Septuagint

laleiye alhqeian ekastoV proV ton plhsion autou

New Testament - Ephesians 4.25

laleite alhqeian ekastoV meta tou plhsion autou

Septuagint

speak truth every man with his neighbour

New Testament

speak ye truth each one with his neighbor

Masoretic Text

Speak ye every man the truth with his neighbor

Comments:  The NT, LXX and the MT agree.