YAHWEH cares for us both in life and in death and HE holds sacred the death and burial of HIS children. Our bodies are HIS temples and as such we should take care of them both in life and in death. We wholly belong to YAHWEH and as such, as Reverence to HIM, we must respect and bury HIS people well.
Genesis 35:27-29 And Jacob came unto Isaac his father unto Mamre, unto the city of Arbah, which is Hebron, where Abraham and Isaac sojourned. And the days of Isaac were an hundred and fourscore years. And Isaac gave up the ghost, and died, and was gathered unto his people, being old and full of days: and his sons Esau and Jacob buried him.
https://bible.com/bible/1/gen.35.27-29.KJV
Deuteronomy 34:5-6 So Moses the servant of the LORD died there in the land of Moab, according to the word of the LORD. And he buried him in a valley in the land of Moab, over against Beth-peor: but no man knoweth of his sepulchre unto this day.
https://bible.com/bible/1/deu.34.5-6.KJV
Psalm 116:15 Precious in the sight of the LORD is the death of his saints.
https://bible.com/bible/1/psa.116.15.KJV
Matthew 26:6-12 Now when Jesus was in Bethany, in the house of Simon the leper, there came unto him a woman having an alabaster box of very precious ointment, and poured it on his head, as he sat at meat. But when his disciples saw it, they had indignation, saying, To what purpose is this waste? For this ointment might have been sold for much, and given to the poor. When Jesus understood it, he said unto them, Why trouble ye the woman? for she hath wrought a good work upon me. For ye have the poor always with you; but me ye have not always. For in that she hath poured this ointment on my body, she did it for my burial.
https://bible.com/bible/1/mat.26.6-12.KJV
Mark 16:1-6 And when the Sabbath was past [that is, after the sun had set], Mary Magdalene, and Mary [the mother] of James, and Salome purchased sweet-smelling spices, so that they might go and anoint [Jesus’ body]. And very early on the first day of the week they came to the tomb; [by then] the sun had risen. And they said to one another, Who will roll back the stone for us out of [the groove across the floor at] the door of the tomb? And when they looked up, they [distinctly] saw that the stone was already rolled back, for it was very large. And going into the tomb, they saw a young man sitting [there] on the right [side], clothed in a [long, stately, sweeping] robe of white, and they were utterly amazed and struck with terror. And he said to them, Do not be amazed and terrified; you are looking for Jesus of Nazareth, Who was crucified. He has risen; He is not here. See the place where they laid Him.
https://bible.com/bible/8/mrk.16.1-6.AMPC