Proto-MSA

*bˁr - to go by night (Kogan 2015:550)

The origin is unknown.

Mehri
bār - to go by night (ML 41)
Jibbali
baˁár - to go by night (JL 22)
Soqotri
bóˁor - to come or travel during the night (LS 92; CSOL I 509; CSOL II 428)