Charles H. Spurgeon on Psalms 139:2

Uprising may respect either rising from bed, when the Lord knows whether the heart is still with him (Ps 139:18); what sense is had of the Divine protection and sustentation, and what thankfulness there is for the mercies of the night past; and whether the voice of prayer and praise is directed to him in the morning, as it should be (Ps 3:5 5:3); or else rising from the table, when the Lord knows whether a man's table has been his snare, and with what thankfulness he rises from it for the favours he has received. The Targum interprets this of rising up to go to war; which David did, in the name and strength, and by the direction of the Lord. —John Gill.