Why did Hannah pray for a son?

Hannah's prayer for a son stemmed from her profound sorrow over her barrenness and her desire to fulfill God's purpose. In her anguish, she made a vow to the Lord, promising to dedicate her son to His service if He granted her request (1 Samuel 1:11). This demonstrates the interplay of human desire and divine prompting, as the Lord moved her to pray in accordance with His will. Her heart was aligned with God's plan for Samuel, who would become a great prophet. Thus, Hannah's prayer illustrates how the Spirit leads believers to pray for things aligned with God’s purpose.