Or slayv {sel-awv'}; by orthographical variation from shalah through the idea of sluggishness; the quail collectively (as slow in flight from its weight) -- quails.
Englishman's Concordance
1) quail Part of Speech: noun feminine A Related Word by BDB/Strong’s Number: by orthographical variation from H7951 through the idea of sluggishness Same Word by TWOT Number: 2265
Brown-Driver-Briggs
שְׂלָוnoun feminineExodus 16:13quail (probably foreign word; Arabic , Syriac , Samaritan ); — quail, coturnix communis or vulguris (TristrNHB 229 ff. FFP 124 PostHast. DB. QUAIL, DiExodus 16:13): — absolute collective Numbers 11:32 (J), Exodus 16:13 (P), Psalm 105:40 (in all Qr שְׂלָיו); plural שַׂלְוִיםNumbers 11:31 (J; as if from singular שַׂלְוֶה).
Exodus 16:13 HEB:בָעֶ֔רֶב וַתַּ֣עַל הַשְּׂלָ֔ו וַתְּכַ֖ס אֶת־ NAS: about at evening that the quails came KJV: And it came to pass, that at even the quails came up, INT: evening came the quails and covered the camp
Numbers 11:31 HEB:יְהוָ֗ה וַיָּ֣גָז שַׂלְוִים֮ מִן־ הַיָּם֒ NAS: and it brought quail from the sea, KJV: and brought quails from the sea, INT: the LORD brought quail from the sea
Numbers 11:32 HEB:וַיַּֽאַסְפוּ֙ אֶת־ הַשְּׂלָ֔ו הַמַּמְעִ֕יט אָסַ֖ף NAS: and gathered the quail (he who gathered least KJV: and they gathered the quails: he that gathered least INT: the next and gathered the quail least gathered
Psalm 105:40 HEB:שָׁאַ֣ל וַיָּבֵ֣א שְׂלָ֑ו וְלֶ֥חֶם שָׁ֝מַ֗יִם NAS: and He brought quail, And satisfied KJV: and he brought quails, and satisfied INT: asked brought quail the bread of heaven