Lord, in the day Thou art about. J. Mason. [Security in God.] This cento from Mason's Spiritual Songs; or, Songs of Praise, &c, 1683, appeared in the Mary-le-bone Psalms & Hymns (by J. H. Gurney and others), 1851, No. 118. It is thus composed:—
Stanza i. from No. vi. “Song of Praise for Protection," stanza ii., lines 1-4. Stanza ii. from No. vii. "Song of Praise for Health," stanza ii., lines 1-4. Stanza iii. from No. ix. "Song of Praise for Success," stanza iv., lines1-4. Stanza iv. from No. viii., "Song of Praise for Family Prosperity," stanza v., lines5-8.
These extracts are well pieced together, the result being a simple and practical hymn. It passed from the Mary-le-bone Psalms & Hymns into Lord Selborne's Book of Praise, 1862, and others. The originals of the Songs are in D. Sedgwick's reprint of the same, 1859.
--John Julian, Dictionary of Hymnology (1907)