Easily googled :D
Matthew 7:1-3King James Version (KJV)
7 Judge not, that ye be not judged.
2 For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again.
3 And why beholdest thou the mote that is in thy brother’s eye, but considerest not the beam that is in thine own eye?
Bit of Karma or What goes around comes around maybe?