15 He marched up from there against the people of Debir. Debir used to be called Kiriath Sepher. 16 Caleb said, "Whoever attacks Kiriath Sepher and takes it, I'll give my daughter Acsah to him as his wife." 17 Othniel son of Kenaz, Caleb's brother, took it; so Caleb gave him his daughter Acsah as his wife. 18 When she arrived she got him to ask for farm land from her father. As she dismounted from her donkey Caleb asked her, "What would you like?" 19 She said, "Give me a marriage gift. You've given me desert land; Now give me pools of water!" And he gave her the upper and the lower pools.
Matthew Henry's Commentary on Joshua 15:15-19
Commentary on Joshua 15:13-19
(Read Joshua 15:13-19)
Achsah obtained some land by Caleb's free grant. He gave her a south land. Land indeed, but a south land, dry and apt to be parched. She obtained more, on her request, and he gave the upper and the nether springs. Those who understand it but of one field, watered both with the rain of heaven, and the springs that issued out of the earth, countenance the allusion commonly made to this, when we pray for spiritual and heavenly blessings which relate to our souls, as blessings of the upper springs, and those which relate to the body and the life that now is, as blessings of the nether springs. All the blessings, both of the upper and the nether springs, belong to the children of God. As related to Christ, they have them freely given of the Father, for the lot of their inheritance.