What is the Biblical basis for requiring someone to have faithful children to become an elder? Just had an enlightening chat with a preacher of a faith I'm not familiar with. When I congratulated him on his new pastorship, he corrected me saying that he wasn't a pastor, and among other things he believed he needed to have faithful children before he could become a pastor or elder.  He indicated that there was scriptural basis for this, but I don't recall which scripture he used, other than the New Testament in the KJV bible.

What scriptures support the idea that faithful children are needed prior to attaining a certain office or title?
For pastorship, it depends on the doctrine.

As for an Elder, this is what Titus 1:6 NIV says


  An elder must be blameless, faithful to his wife, a man whose children
  believe and are not open to the charge of being wild and disobedient


I can recall an Elder loosing his sword/title because his teen daughter had an incident at a house party. He was very sad. He ended up droping out of the church.

The point is how can an elder take care of his church when he cannot take care of his own family.