Saul sent messengers to David's house, to watch him, and to kill him in the morning: and Michal, David's wife, told him, saying, If you don't save your life tonight, tomorrow you will be slain.
"That night"  (1 Samuel 19:11).  "This cannot mean the night of the spear-throwing, for it is said there that David escaped."[10]  Indeed it does refer to that night, as Keil very adequately explained above.  All critical allegations against this chapter are solved by understanding it just as it is written.  Another extremely bizarre "interpretation" is that of H. P. Smith who insisted that "the night" here was "the wedding night" of David and Michal.[11]