A bosom is a person's chest. This is a idiom with the image of him holding her close to his chest; this means that he loves and cherishes her. Alternate translation: "wife you love" or "wife you dearly embrace" (See: [[rc://en/ta/man/jit/figs-idiom]])
Here "soul" represents the person's life. This means the person cares for his friend as much as he cares for his own life. Alternate translation: "your dearest friend" or "a friend you love as much as you love yourself" (See: [[rc://en/ta/man/jit/figs-metonymy]] and [[rc://en/ta/man/jit/figs-idiom]])