until I find a place for the LORD,
He would continue until he found a place for the LORD, a dwelling for the Mighty One of Jacob.
This verse states the purpose of the vow directly.
1A song of ascents. 2how he swore an oath to the LORD, 3“I will not enter my house 4I will not give sleep to my eyes 5until I find a place for the LORD, 6We heard that the ark was in Ephrathah; 7Let us go to His dwelling place; 8Arise, O LORD, to Your resting place, 9May Your priests be clothed with righteousness, 10For the sake of Your servant David, 11The LORD swore an oath to David, 12If your sons keep My covenant 13For the LORD has chosen Zion; 14“This is My resting place forever and ever; 15I will bless her with abundant provisions; 16I will clothe her priests with salvation, 17There I will make a horn grow for David; 18I will clothe his enemies with shame,