'Power' in the Bible

{It is in my power} to do harm to you, but the God of your father spoke to me last night saying, '{Take care} from speaking with Jacob, whether good or evil.'

Then Joseph answered Pharaoh saying, "{It is not in my power}; God will answer [concerning] the well-being of Pharaoh."

Reuben, you [are] my firstborn, my strength, and the firstfruit of my vigor, excelling in rank and excelling in power.