Exodus 16:13

Quails - This bird migrates in immense numbers in spring from the south: it is nowhere more common than in the neighborhood of the Red Sea. In this passage we read of a single flight so dense that it covered the encampment. The miracle consisted in the precise time of the arrival and its coincidence with the announcement.

Though it may be exhaled by the heat and afterwards fall with the dew, it is a medicine, not food--it is well known to the natives of the desert, while the Israelites were strangers to theirs; and in taste as well as in the appearance of double quantity on Friday, none on Sabbath, and in not breeding worms, it is essentially different from the manna furnished to the Israelites.

At even the quails came - שלו selav, from שלה salah, to be quiet, easy, or secure; and hence the quail, from their remarkably living at ease and plenty among the corn. “An amazing number of these birds,” says Hasselquist, Travels, p. 209, “come to Egypt at this time, (March), for in this month the wheat ripens. They conceal themselves among the corn, but the Egyptians know that they are thieves, and when they imagine the field to be full of them they spread a net over the corn and make a noise, by which the birds, being frightened, and endeavoring to rise, are caught in the net in great numbers, and make a most delicate and agreeable dish.” The Abbé Pluche tells us, in his Histoire du Ciel, that the quail was among the ancient Egyptians the emblem of safety and security. “Several learned men, particularly the famous Ludolf, Bishop Patrick, and Scheuchzer, have supposed that the שלוים selavim eaten by the Israelites were locusts. But not to insist on other arguments against this interpretation, they are expressly called שאר sheer, flesh, Psa 78:27, which surely locusts are not; and the Hebrew word is constantly rendered by the Septuagint ορτυγομητρα, a large kind of quail, and by the Vulgate coturnices, quails. Compare The Wisdom of Solomon 16:2, 19:12; Num 11:31, Num 11:32; Psa 105:40; and on Numbers 11 observe that כאמתים keamathayim should be rendered, not two cubits high, but as Mr. Bate translates it, ‘two cubits distant, (i.e., one from the other), for quails do not settle like the locusts one upon another, but at small distances.’ And had the quails lain for a day’s journey round the camp, to the great height of two cubits, upwards of three feet, the people could not have been employed two days and a night in gathering them. […]