What about the people who think they know God's voice, but don't really? What about Deanna Laney, who killed her children on God's orders? I bet she thinks she knows God's voice. And who can say, really? This command is consistent with God's Word. There is precedent: Abraham was ordered to kill his son. God didn't stop Deanna, though, at the last moment.
And the NT doesn't help much. Matt 19:29 tells us we'll be rewarded if we forsake "houses, or brethren, or sisters, or father, or mother, or wife, or children".
So, who can say? Maybe God did tell Deanna Laney to kill her children.
Thoughts, anyone?
__________________
Hebrews 13:23 Know ye that our brother Timothy is set at liberty