This verse is part of the story of the prophet Elisha and the widow who was in debt. Let's break down what it means:

"So she went from him": She left Elisha after he gave her instructions on what to do. Elisha had told her to gather as many empty containers as possible from her neighbors.

"and shut the door on herself and on her sons": This is a crucial part. Closing the door was likely done for two reasons:

Privacy: It kept the miracle from being seen by others, emphasizing that it was a work of God. This also ensured she had the focus to perform the task, rather than being distracted by onlookers.
Intimacy: It created a private, almost sacred space for God's provision to occur. It fostered an atmosphere of faith and dependence on God.

"They brought the containers to her": Her sons were actively involved in the process. They were bringing her the empty vessels.

"and she poured oil": This is where the miracle happened. She poured oil from the small flask she had (mentioned in earlier verses), and it miraculously continued to flow as long as there were empty containers to fill.

In summary:

The verse describes the widow's obedience to Elisha's instructions. By shutting the door, she created a private space, and with the help of her sons, she poured oil continuously into the empty containers. This set the stage for the miraculous multiplication of the oil, which would allow her to sell it, pay off her debts, and provide for her and her sons' future.

The verse highlights themes of:

Faith and Obedience: The widow's willingness to trust and obey the prophet's instructions, even when they seemed strange, was key to receiving the miracle.
God's Provision: God's miraculous provision for those who are in need and trust in Him.
Active Participation: The sons' involvement emphasizes the need for active participation in receiving God's blessings.
Privacy and Intimacy in Faith: The closed door suggests that sometimes, encountering God's power requires a quiet, focused, and personal setting.