According to the author of 1 Kings, when the queen of Sheba visited King Solomon, he gave her everything she wanted and even more gifts because he was very generous. After receiving all these things, she went back home with her helpers.
1 Kings 10:13: And king Solomon gave unto the queen of Sheba all her desire, whatsoever she asked, beside [that] which Solomon gave her of his royal bounty. So she turned and went to her own country, she and her servants. [of his...: Heb. according to the hand of king Solomon]
This verse says Solomon gave the queen of Sheba all her desire, which aligns with 1 Kings 10:13 but could imply a difference in understanding of the events or generosity as both verses describe the same event.
2 Chronicles 9:12: And king Solomon gave to the queen of Sheba all her desire, whatsoever she asked, beside [that] which she had brought unto the king. So she turned, and went away to her own land, she and her servants.