John Wesley on 2 Kings 4:7

Unto her son - To one of them: for she had two, ver.1. The oil stayed - To teach us, that we should not waste any of his good creatures; and that God would not work miracles unnecessarily. We are never straiten'd in God, and in his power and bounty, and the riches of his grace. All our straitness is in ourselves. It is our faith that fails, not his promise. Were there more vessels, there is enough in God to fill them, enough for all, enough for each.