The free-will offerings of my mouth; either,
1. Those which I have promised with my mouth, though I am not now in a capacity of performing my promises, as being banished from thy house. Or rather,
2. The sacrifices of prayer and praises, which I do freely and frequently offer unto thee; which are called sacrifices, as Psalms 50:14, and calves of our lips, Hosea 14:2.