This Bible contradiction is from the EvilBible.com.
Judging of others if forbidden
Matthew 7:1-2 View context
Judge not, that ye be not judged.
For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again.
Judging of others is approved
1 Corinthians 6:2-4 View context
Do ye not know that the saints shall judge the world? and if the world shall be judged by you, are ye unworthy to judge the smallest matters?
Know ye not that we shall judge angels? how much more things that pertain to this life?
If then ye have judgments of things pertaining to this life, set them to judge who are least esteemed in the church.
1 Corinthians 5:12 View context
For what have I to do to judge them also that are without? do not ye judge them that are within?