There is no poem called "Silence" by Stephen King. Stephen King is primarily known for his horror novels and short stories. It's possible you are thinking of a poem by another author, or you may have misremembered the title.
If you can provide more context, I can help you find the poem you are looking for. For example, do you remember any lines from the poem? Or is there a particular theme or topic related to the poem you are looking for?