Regarding Moses, Allah says:

رَبِّ بِمَا أَنْعَمْتَ عَلَيَّ فَلَنْ أَكُونَ ظَهِيرًا لِّلْمُجْرِمِينَ

Rabbi bimaaa an'amta 'alayya falan akoona zaheeral-lil-mujrimeen.

My Lord, for the favor You bestowed upon me, I will never be an assistant to the criminals.

Reference: Surah Al-Qasas 28:17