He sendeth the springs into the valleys, which run among the hills.
He sendeth the springs into the valleys ... They give drink to every beast of the field - literally, 'river-valleys' х nachal (H5158)]; valleys forming the beds of streams. Besides driving away the hostile sea-floods, God waters the dry land for the nourishment of His creatures. The creation of the vegetable world belongs to the third day (Genesis 1:11-12). Here the Psalmist brings forward the necessary element to the development of vegetation (Genesis 2:5). 'The beasts of the field' are the wild animals, as distinguished from "the cattle" (Psalms 104:14), domestic animals.
Quench their thirst - literally, break, etc. As we use the phrase, 'break one's fast.'