New King James Version (NKJV)
For this is the message that you heard from the beginning, that we should love one another,

New International Version (NIV)
[ More on Love and Hatred ] For this is the message you heard from the beginning: We should love one another.

English Standard Version (ESV)
[ Love One Another ] For this is the message that you have heard from the beginning, that we should love one another.

King James Version (KJV)
For this is the message that ye heard from the beginning, that we should love one another.