Charles Ellicott Commentary 2 Samuel 18:28

"And Ahimaaz called, and said unto the king, All is well. And he bowed himself before the king with his face to the earth, and said, Blessed be Jehovah thy God, who hath delivered up the men that lifted up their hand against my lord the king." — 2 Samuel 18:28 (ASV)

All is well. —Literally, Peace, as in the margin. This is the cry with which Ahimaaz greets the king in his eager haste, as soon as he comes within hearing. He then approaches and falls down reverentially, with a distinct announcement of the victory.