OK, I'm game; perhaps you could answer the questions I posed as well ?
The prayers of the saints (those on earth) are offered by those in heaven to God.
From the OT:
Rachel died in childbirth, before Joseph was sold into slavery, and before the exile.
Verse 15 is quoted in Matthew, re: the death of the innocents. In Jewish understanding, the passage is also the intercession of Rachel to God (so I have included His answer).
Recall the Psalmist attests:
If I ascend up into heaven, thou art there: if I make my bed in Sheol*, behold, thou art there. Psalm 139:8
(the KJV has hell, which in modern use tends to be associated with Gehenna; the Hebrew has Sheol, and the LXX has Hades here)
The Jews had been asking for the intercessions of Rachel for centuries by the time of Christ (according to several references, first by her son Joseph as he passed by her tomb on the way to his slavery in Egypt). Compare this with Christ's use of the Parable of the Rich Man and Lazaros -- the impossibility of communication is between those in the Bosom of Abraham and those in a place of agony.