Peter says that Sarah called Abraham "lord" (i.e., master) and that it was a good thing.
When did she do this? And how does Peter know this? I can't find it anywhere in scripture.
1 Peter 3:5,6 ESV For this is how the holy women who hoped in God used to adorn themselves, by submitting to their own husbands, as Sarah obeyed Abraham, calling him lord. And you are her children, if you do good and do not fear anything that is frightening.