Proto-MSA

*ḳhb - to be in daytime (Kogan 2015:561)

The origin is unknown.

Mehri
kəḥēb - to come in the middle of the day (ML 226)
The verb widely attested in SAE IX and SAE III, Mundart B “to the detriment of nkˁ, which, nevertheless, apparently preserves its basic status in all Mehri corpora” (Kogan 2015:494)
Jibbali
ḳɛhέb - to be in daytime, to spend the day (JL 142)