¹ tn The text simply has “evening, and you will know.” Gesenius notes that the perfect tense with the vav consecutive occurs as the apodosis to temporal clauses or their equivalents. Here the first word implies the idea “[when it becomes] evening” or simply “[in the] evening” (GKC 337-38 §112.oo).

sn Moses is very careful to make sure that they know it is Yahweh who has brought them out, and it will be Yahweh who will feed them. They are going to be convinced of this now.

² sn These are migratory birds, said to come up in the spring from Arabia flying north and west, and in the fall returning. They fly with the wind, and so generally alight in the evening, covering the ground. If this is part of the explanation, the divine provision would have had to alter their flight paths to bring them to the Israelites, and bring them in vast numbers.