'Nay' in the Bible

Hezekiah answered, "It is a light thing for the shadow to go forward ten steps. Nay, but let the shadow return backward ten steps."

Were they ashamed when they had committed abomination? nay, they were not at all ashamed, neither could they blush: therefore shall they fall among those who fall; in the time of their visitation they shall be cast down, says Yahweh.