PCS

*ribab-at-/ribb-at-, *ribw-at- - ten thousand, myriad (Kogan 2015: 197)

Ebla
rí-PAP - ten thousand (Krebernik 1996:246)
Ugaritic
rbt - ten thousand, myriad (DUL 730)
pl. rbt, rbbt
Hebrew
rəbābā - a very great quantity, immense number (HALOT 1175)
Hebrew
ribbō(ˀ) - many, ten thousand (HALOT 1178)
Syriac
rebbu - ten thousand (LSyr. 707, SL 1426)
Arabic
ribbiyy-, rabbiyy-, rubbiyy- - ten thousand (Lane 1006)
Arabic
rabw-, rubwat-, ribwat-, rubat- - ten thousand (Lane 1023)
Geez
ˀarbāb - myriads; name of a body of angels (LLA 287, CDG 36)
a borrowing from Arabic
Geez
rabbawāt - myriads (LLA 287, CDG 462)
a borrowing from Arabic