He was later let off with a stern warning from the police.

Didn't let him do it without a stern warning.

Later, his mother said, she gave him a stern warning after he kicked a helmet.

But before giving her the money, he added a stern warning.

Several times, a stern warning prevented one or two from running down to join the visitors.

I remembered my father's stern warning not to discuss the incident with anyone.

But he gave a stern warning: "You've got to take this issue out of the political box."

He gave a stern warning against the dangers of the arms race.

The court gave a stern warning against future attempts to scoop it.

Included was the stern warning to include coffee breaks, or the report would be considered false.