My God, 'tis to Thy Mercy-seat. Anne Steele. [The Mercy-Seat.] First published in her Poems on Subjects chiefly Devotional, &c, 1760, vol. i. p. 133, in 6 stanzas of 4 lines, and headed: "Refuge and Strength in the Mercy of God." It was repeated in the 2nd edition of the Poems, &c., 1780, and in Sedgwick's reprint of her Hymns, 1863. It is in common use both in its original form and as "Dear Father, to Thy Mercy-seat." The latter form is chiefly in use in America.
--John Julian, Dictionary of Hymnology (1907)