Psalms 6:5 is about people not remembering their ancestors.
What? No it isn't. It transparently is not. Where are you getting that from?
Here is Psalm 6 in its entirety:
O Lord, do not rebuke me in Your anger, Nor chasten me in Your hot displeasure. Have mercy on me, O Lord, for I am weak; O Lord, heal me, for my bones are troubled. My soul also is greatly troubled; But You, O Lord--how long? Return, O Lord, deliver me! Oh, save me for Your mercies' sake! For in death there is no remembrance of You; In the grave who will give You thanks? I am weary with my groaning; All night I make my bed swim; I drench my couch with my tears. My eye wastes away because of grief; It grows old because of all my enemies.
Depart from me, all you workers of iniquity; For the Lord has heard the voice of my weeping. The Lord has heard my supplication; The Lord will receive my prayer. Let all my enemies be ashamed and greatly troubled; Let them turn back and be ashamed suddenly.
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I don't see anything about anyone's ancestors in there, or otherwise addressed to anyone but God.
Have you remembered your great great great grandmother on your father's side of the family? Do you know where she is buried? Do you know who her great great grand mother is? Have you thanked her?
She buried somewhere in Mexico, I imagine, and no I don't know where. Nor does this have anything to do with anything in the Psalm.
Our spirit returns to God
Yes, and? What does this have to do with anything, either?
You should have quoted the rest of the dialogue with Abraham recorded in Luke...particularly where Abraham tells the man no, because he didn't listen in life, so that's not how things are going to work now that he's dead.
Gee, I wonder why you didn't quote that.
Let's see...
25 But Abraham said, ‘Son, remember that in your lifetime you received your good things, and likewise Lazarus evil things; but now he is comforted and you are tormented. 26 And besides all this, between us and you there is a great gulf fixed, so that those who want to pass from here to you cannot, nor can those from there pass to us.’
27 “Then he said, ‘I beg you therefore, father, that you would send him to my father’s house, 28 for I have five brothers, that he may testify to them, lest they also come to this place of torment.’ 29 Abraham said to him, ‘They have Moses and the prophets; let them hear them.’ 30 And he said, ‘No, father Abraham; but if one goes to them from the dead, they will repent.’ 31 But he said to him, ‘If they do not hear Moses and the prophets, neither will they be persuaded though one rise from the dead.’ ”