Weni's tomb is located at Abydos which curiously a second tomb for Weni was discovered at Saqqara with a near identical version of his autobiography found inside.
Harkhouf's tomb is in west Aswan at the cemetery of Qubbet el-Hawa.
Autobiography of Weni
For greater context, noted before HERE.
Autobiography of Harkhuf (Herkhuf)
SLIDESHOW.
Both were written in the 23rd century BC i.e. during the Old Kingdom Pyramid Age and the era the bulk of the Pyramid Texts were being written.
Harkhouf's tomb is in west Aswan at the cemetery of Qubbet el-Hawa.
Autobiography of Weni

For greater context, noted before HERE.
Autobiography of Harkhuf (Herkhuf)

SLIDESHOW.
Both were written in the 23rd century BC i.e. during the Old Kingdom Pyramid Age and the era the bulk of the Pyramid Texts were being written.