Two years after God enabled Joseph to interpret the Chief Cupbearer's dream, God caused Pharaoh to have two dreams which troubled hIm. When his magicians and wise men were unable to interpret the dreams, the Chief Cupbearer confessed to the Pharaoh that Joseph had interpreted his dream. Joseph was summoned to the Pharaoh who asked Joseph if he could interpret his dreams. Joseph replied, "I cannot, but God can."
Reference: Genesis 41:1-16