fay, faith. Over God's forbode, on God's prohibition, i.e. God forbid.
The yeomen thanketh them full courteously,
And said, "To some bishop will we wend,
Of all the sins that we have done
To be assoiled at his hand."
So forth be gone these good yeomen,
As fast as they might hie,
And after came and dwelled with the king,
And died good men all three.
Thus endeth the lives of these good yeomen,