Arcana Coelestia #884
884. 'And behold, in its mouth an olive leaf plucked off' means a small measure of the truth of faith; 'leaf' meaning truth, 'olive' good that stems from charity, 'plucked off' the fact that the truth of faith derives from that charity, and 'in its mouth' the fact that it was made visible. This is clear from the meaning of 'olive' and is evident from the very words themselves. That a tiny quantity is meant is clear from the fact that it was a leaf and no more.
Daniel 12:1
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"At that time shall Michael stand up, the great prince who stands for the children of your people; and there shall be a time of trouble, such as never was since there was a nation even to that same time: and at that time your people shall be delivered, everyone who shall be found written in the book.