Awake, my heart, arise my tongue. I. Watts. [Spiritual Clothing.] First published in his Hymns and Sacred Songs, 1707 (1709, Bk. i., No. 20), in 6 stanzas of 4 lines, and again in later editions. It is based on Is. lxi. 10. It came into common use at an early date, and is still found in many collections in Great Britain and America.
-- John Julian, Dictionary of Hymnology (1907)