Ciira wa mwega utuo ta wa muuru

The case of good persons must be judged in the same way as that of bad ones.

What it means
Judge everyone by the same standard, whether they are well liked or not. Otherwise it isn't judgment, just favoritism.
Kikuyu · East Africa
Source and context
From: Kikuyu, East Africa
Source: Gikuyu (Kenya) oral-tradition proverb — "African Proverb of the Month," July 2019 (afriprov.tangaza.ac.ke)

The source explains it: fairness must always prevail in all cases/decisions irrespective of one's status in society. The wording of the meaning is ours.