As with many common verbs, the meaning of “to say” in the Bible is highly dependent on context. Who is speaking? Who is hearing? What is it about? Is it a command, a message, an apology, instruction? All these things enter into the meaning of “say.” In general, though, “saying” has to do with sharing truth at various levels -- from the most exalted power people can have to perceive the Lord's desires directly to the most basic of orders issued to people at their lowest.
Sister
In Genesis 4:22 and 12:13, this signifies intellectual truth. (Arcana Coelestia 1475)
In Genesis 24:30 and 24:59, this signifies the affection of truth. (Arcana Coelestia 3133, 3182)
In Genesis 24:60, this signifies a desire for truth. (Arcana Coelestia 3186)
In Genesis 30:8, this signifies temptation resulting in victory. (Arcana Coelestia 3927)
In Exodus 2:4, this signifies rational truth. (Arcana Coelestia 6727)
The Lord calls people who are in truth from the good of charity from Him 'sisters' in Matthew 12:50. 'Sister' denotes intellectual truth and 'wife' celestial truth.
(Референце: Apocalypse Explained 746; Matthew 12)