Bible Verses About Salutations: Persons in haste excused from giving or receiving

Then he said to Gehazi, Gird up thy loins, and take my staff in thy hand, and go thy way: if thou meet any man, salute him not; and if any salute thee, answer him not again: and lay my staff upon the face of the child.

for I say unto you, that many prophets and kings desired to see the things which ye see, and saw them not; and to hear the things which ye hear, and heard them not.