I was very glad because I discovered some of your sons walking in the truth, just as we received the commandment from the Father
Other versions
King James Version
I rejoiced greatly that I found of thy children walking in truth, as we have received a commandment from the Father.English Standard Version
I rejoiced greatly to find some of your children walking in the truth, just as we were commanded by the Father.New International Version
It has given me great joy to find some of your children walking in the truth, just as the Father commanded us.