Matthew Henry Commentary Joshua 15:13-19

"And unto Caleb the son of Jephunneh he gave a portion among the children of Judah, according to the commandment of Jehovah to Joshua, even Kiriath-arba, [which Arba was] the father of Anak (the same is Hebron). And Caleb drove out thence the three sons of Anak: Sheshai, and Ahiman, and Talmai, the children of Anak. And he went up thence against the inhabitants of Debir: now the name of Debir beforetime was Kiriath-sepher. And Caleb said, He that smiteth Kiriath-sepher, and taketh it, to him will I give Achsah my daughter to wife. And Othniel the son of Kenaz, the brother of Caleb, took it: and he gave him Achsah his daughter to wife. And it came to pass, when she came [unto him], that she moved him to ask of her father a field: and she alighted from off her ass; and Caleb said, What wouldest thou? And she said, Give me a blessing; for that thou hast set me in the land of the South, give me also springs of water. And he gave her the upper springs and the nether springs." — Joshua 15:13-19 (ASV)

Achsah obtained some land by Caleb's free grant. He gave her a south land—land indeed, but a south land, dry and likely to be parched. She obtained more on her request, and he gave her the upper and the lower springs.

Those who understand this account as referring to only one field—watered both by the rain of heaven and by the springs that issued from the earth—support the common allusion made to it. This allusion is made when we pray for spiritual and heavenly blessings (which relate to our souls) as blessings of the upper springs, and for those blessings (which relate to the body and this present life) as blessings of the lower springs. All the blessings, both of the upper and the lower springs, belong to the children of God. As related to Christ, they have them freely given by the Father as their allotted inheritance.