What does 1 Samuel 26:8 mean?

Abishai whispered to David, 'God has handed your enemy over to you tonight. Let me pin him to the ground with his own spear. I won’t need to strike twice.' 1 Samuel 26:8 - Modern Text Bible

(Abishai sees this as a sign from God and wants to kill Saul right then, thinking it’s the perfect chance to end their troubles.)