After Samuel, how many more children did the LORD give Hannah?

Answer: Three sons and two daughters

The LORD attended to Hannah, and she gave birth to three sons and two daughters, while the boy Samuel grew up before the LORD.

“So the LORD attended to Hannah, and she conceived and gave birth to three sons and two daughters. Meanwhile, the boy Samuel grew up in the presence of the LORD.”— 1 Samuel 2:21 (BSB)