PCS

*ṣlḥ - to be well, to prosper (Kogan 2015: 198)

note Mhr. ṣáyləḥ ‘fat’

Hebrew
ṣlḥ - to prosper, to be good for (HALOT 1025–1027)
Syriac
ṣlḥ - to turn out well, succeed, increase (LSyr. 629, SL 1287)
Arabic
ṣlḥ - to be good (Lane 1714)
Sabaic
ṣlḥ - to give prosperity (SD 142)
Mehri
həṣlēḥ - to arrange a truce (ML 363)
a borrowing from Arabic
Jibbali
ṣélaḥ - to be suitable, fine (JL 239)
a borrowing from Arabic