What did Samuel hear in the middle of the night?

In the middle of the night, Samuel heard a voice calling his name. Initially thinking it was Eli, the priest he served under, he ran to him, but Eli told him he hadn't called. This happened multiple times until Eli realized that God was speaking to Samuel, instructing him to respond, "Speak, Lord, for your servant is listening." This moment marked the beginning of Samuel's prophetic ministry.