Arcana Coelestia # 4519
4519. 'And they will be gathered together against me and will smite me, and I shall be destroyed' means, for the Ancient Church so to perish. This is clear from the meaning of 'being gathered together, smitten, and destroyed' as perishing. The reason why the Ancient Church is meant is that Jacob says this of himself and his house. For here 'Jacob' means the Ancient Church, see above in 4514.
Two and a half
In Exodus 25:10, this signifies much and full; when predicated of the Divine it signifies all. Its meaning is similar to that of five and ten.