Per its title, Psalm 59 was written when Saul sent men to watch what?

Answer: David's house

Psalm 59's title: a Miktam of David "when Saul sent men to watch David's house in order to kill him."

“For the choirmaster. To the tune of “Do Not Destroy.” A Miktam of David, when Saul sent men to watch David’s house in order to kill him. Deliver me from my enemies, O my God; protect me from those who rise against me.”— Psalm 59:1 (BSB)