Moses speaks of the clouds from which the rain falls as if they were a building where he stores the rain. Alternate translation: "the clouds" (See: [[rc://en/ta/man/translate/figs-metaphor]])
The word "hand" is a synecdoche for the whole person. Alternate translation: "all the work that you do" (See: [[rc://en/ta/man/translate/figs-synecdoche]])