Arcana Coelestia#7927
7927. 'And He will see the blood on the lintel and on the two doorposts' means a discernment of the holy truth belonging to the good of innocence in the natural. This is clear from the meaning of 'seeing' as understanding and discerning, dealt with in 2150, 2325, 2807, 3764, 4403-4421, 4567, 4723, 5400; from the meaning of 'the blood' as holy truth belonging to the good of innocence, as above in 7919; and from the meaning of 'the lintel and the two doorposts' as the forms of good and the truths of the natural, also dealt with above, in 7847.
Arcana Coelestia#7919
7919. 'And you shall dip it in the blood' means holy truth belonging to the good of innocence. This is clear from the meaning of 'the blood', here the blood of the lamb, as holy truth belonging to the good of innocence, dealt with above in 7846, 7877. What truth belonging to the good of innocence is, see 7877.