“I have promises to keep and miles to go before I sleep.”
Robert Frost Stopping by Woods on a Snowy Evening
"Stopping by Woods on a Snowy Evening" (1923) http://www.poetryfoundation.org/poem/171621 <br class="br">Variant: And miles to go before I sleep. <br class="br">Context: The woods are lovely, dark and deep.<br>But I have promises to keep,<br>And miles to go before I sleep,<br>And miles to go before I sleep.