Lesley, the footnote 11 next to the word Dayspring in this passage states...
5 He who overcomes shall be clothed in white garments, and I will not blot out his name from the Book of Life; but I will confess his name before My Father and before His angels.
I've noticed that Tyndale & the Geneva Bible use departure.
2 Thessalonians 2:3
3 Let no one deceive you by any means; for that Day will not come unless the falling away comes first, and the man of sin is revealed, the son of perdition.
Luke 2: 1-7 1 And it came to pass in those days that a decree went out from...