But I have promises to keep,And miles to go before I sleep' was stated by-

• Robert Frost is American National poet.
• His famous poems:
- Stopping by Woods On a Snowy Evening,
- Nothing Gold Can Stay,
- After Apple-Picking,
- Road Not Taken,
- Mending Wall,
- Christmas Trees,
- Home Burial,
-A Way Out (one act play) etc.
• ''The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep'' taken from his famous poem Stopping by Woods On a Snowy Evening.
Source: ওয়েবসাইট Lecture and Encyclopedia of Britannica.