How would marrying Saul’s daughter be a snare/stumbling block to David?
1 Samuel 18:20-21 (KJV):
And Michal Saul’s daughter loved David: and they told Saul, and the thing pleased him. And Saul said, I will give him her, that she may be a snare to him, and that the hand of the Philistines may be against him…