Kebra Nagast 65
2And the Archbishops who were there answered and said, "Hath God had mercy on Solomon for this error which is written down [as] his sin?"
4For God is a forgiver of those who have sinned.
5Come now, and consider, which was the greater of the two, the sin of his father David or the sin of his son Solomon?
7(Bathsheba), the mother of Solomon; and he repented, and God had compassion on him, And when he was dying he advised his son Solomon, saying, "Kill Joab as he killed `Amer (Abner), and kill Shimei because he cursed me"; and he performed the will of his father and slew them after the death of David his father.
9And as concerning the error of Solomon which is written down I will reveal it to you, even as God hath revealed it to me.