What will be an XPath of element containing "9"?

What will be a correct XPath for locating "9" from line "09 Some text"?

<div class="callout" data-testid="callout" xpath="1">
    <span class="container" data-testid="callout" xpath="1">
    </span>
    <p xpath="1">"Some text"</p>
   "Some text1"
   "09 Some text"
   "Some text3"
</div>

I've tried the 3 locators below and I can locate element "9" from Chrome "Find by XPath" but when I use these in an automation script (Selenium WebDriver, C#m and specflow), they don't work.

IsElementDisplayed(By.XPath("xpath below"));

1. //div[contains(@class,'callout')]/descendant::text()[contains(., '9')]

2. //div[contains(@class, 'callout')]//text()[contains(normalize-space(.), '9')]

3. //div[contains(@class,'callout')]//text()[contains(., '9')]

This one below doesnt work in both (Chrome "Find by xpath" / automation script)

//div[contains(@class, 'callout')]//*[contains(text(), '9')]

You can't use an XPath to return just a string/text in Selenium. For example, if you use the XPath

//div[@class='callout']/text()

it throws

Exception has occurred: InvalidSelectorException
Message: invalid selector: The result of the xpath expression "//div[@class='callout']/text()" is: [object Text]. It should be an element.

You CAN use a CSS selector

div.callout

and it returns the entire block of text inside the DIV

"\"Some text\"\r\n\"Some text1\" \"09 Some text\" \"Some text3\""

Then you can parse that down to the line you want.

string allText = driver.FindElement(By.CssSelector("div.callout")).Text;
string text = allText.Split('"').Where(w => w.StartsWith("09")).ToArray().First();
Console.WriteLine(text);

which prints

09 Some text