'May' in the Bible

Then I was filled with fear. I replied to the king, "May the king live forever. Why shouldn't I be troubled, since the city where my ancestral sepulchers are located lies waste, with its gates burned by fire?"

So I called the priests and made them take an oath to fulfill this promise. I also shook my robes, and said, "May God shake out every man from his house and his possessions who does not keep this promise. May he be emptied out and shaken just like this." All the assembly said, "Amen!" and praised the LORD. And the people kept their promise.

Then the descendants of Levi Jeshua, Kadmiel, Bani, Hashabneiah, Sherebiah, Hodiah, Shebaniah, and Pethahiah said, "Stand up and bless the LORD your God from eternity to eternity! Blessed be your glorious name! May it be exalted above all blessing and praise!