"Good morning!" said Bilbo,... «The Hobbit»

"Good morning!" said Bilbo, and he meant it. The sun was shining, and the grass was very green. But Gandalf looked at him from under long bushy eyebrows that stuck out further than the brim of his shady hat.
"What do you mean?" he said. "Do you wish me a good morning, or meant that it is a good morning whether I want it or not; or that it is a morning to be good on?"

***
'Where did you go to, if I may ask?' said Thorin to Gandalf as they rode along.
'To look ahead,' said he.
'And what brought you back in the nick of time?'
'Looking behind,' said he.