For the Lord will make ... a sure house - Compare 1 Samuel 2:35, and 2 Samuel 7:16; 1 Kings 11:38. Abigail’s firm persuasion of David’s kingdom stands upon the same footing as Rahab’s conviction of God’s gift of Canaan to the Israelites Joshua 2:9-13. Both testified to God’s revelation and their own faith. This is doubtless the reason why Abigail’s speech is recorded.
Related Commentaries of 1 Samuel 25:28
1 Samuel 25:28
28 I pray thee, forgive the trespass of thine handmaid: for the LORD will certainly make my lord a sure house; because my lord fighteth the battles of the LORD, and evil hath not been found in thee all thy days.