Psalm 52
Psalm 52 contains David’s response to Doeg's actions. He accuses him of falsehood (Psalm 52:1–4) and then foretells divine judgment (Psalm 52:5–7). Confident in God’s unfailing love (Psalm 52:8) and protection, he then praises the Lord for his deeds and presence (Psalm 52:9). This would be a good song to sing in response to your sermon.
6 Now Saul heard that David was discovered, and the men who were with him. Saul was sitting at Gibeah under the tamarisk tree on the height with his spear in his hand, and all his servants were standing about him.