#your eyes see, and the eyes of my brother Benjamin

The word "eyes" stands for the entire person. AT: "All of you and Benjamin can see" (See: [[:en:ta:vol2:translate:figs_synecdoche]])

#that it is my mouth that speaks to you

The word "mouth" stands for the entire person. AT: "that I, Joseph, am speaking to you" (See: [[:en:ta:vol2:translate:figs_synecdoche]])

#about all my power in Egypt

"how the people in Egypt greatly honor me"

#my father down here

It was common to use the word "down" when speaking of traveling from Canaan to Egypt. AT: "my father here to me"