Donald Trump Jr. said Friday that his father kept his promise to "bomb the hell of ISIS," which was a frequent line of the Republican on the campaign trail.

The president's son tweeted an emoji of a check mark next to the phrase "bomb the hell out of ISIS."

Using the hashtag "#Moab," Trump referenced the United States dropping the Massive Ordnance Air Blast — nicknamed "Mother of All Bombs" — in Afghanistan on Thursday.

He also tweeted an emoji of a bomb and the hashtag #maga, which stands for "make America great again."

A senior defense official said Friday that the top U.S. commander in Afghanistan didn't actually ask for direct permission from President Trump before the bomb was dropped.