Usage: 2 forms in 4 verses
Form Translated As     In Verse(s)
σταισ dough LXX.Exod.12.39LXX.2Sam.13.8LXX.Jer.7.18
σταίσ their dough LXX.Exod.12.34

Liddell-Scott-Jones

σταῖς (stais) dough G:N-N

σταῖς

or σταίς (not στᾷς), τό, genitive σταιτός, flour of spelt mixed and made into dough, [LXX+5th c.BC+]; εἰ μὴ κόρη δεύσειε τὸ σ. [Refs 5th c.BC+]; also of dough in general, [Refs 2nd c.AD+]

__II ={στέαρ}, ϊος σταῖς uncertain reading in [Refs 5th c.BC+]; ἐν σταιτὶ τρίβειν [Refs]

LSJ Scripture Refs: LXX.Exod.12.34