Symbolic of an invitation, Song. 5:2, Rev. 3:20
To hear knocking in your dreams (or to see someone else knocking), suggests that your unconscious is trying to attract your attention to some aspect of yourself or to some waking situation.
A new opportunity - or money - may be presented to you.
If you were doing the knocking, the dream is warning you against loose talk and trusting in shady friends.
Guard your tongue and you are well on the way to happiness.
To hear knocking in your dreams, denotes that tidings of a grave nature will soon be received by you.
If you are awakened by the knocking, the news will affect you the more seriously.
To hear knocking, rapping or pounding in a dream is a warning against the evil tongues of people who are seeking your downfall.