using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

var _bibleRefRegex = new Regex(@"(?:(?:[123]|I{1,3})\s*)?(?:[A-Z][a-zA-Z]+|Song of Songs|Song of Solomon).?\s*(?:1?[0-9]?[0-9]):\s*\d{1,3}(?:[,-]\s*\d{1,3})*(?:;\s*(?:(?:[123]|I{1,3})\s*)?(?:[A-Z][a-zA-Z]+|Song of Songs|Song of Solomon)?.?\s*(?:1?[0-9]?[0-9]):\s*\d{1,3}(?:[,-]\s*\d{1,3})*)*");

​

string paragraph =@"As I besought thee to abide still at Ephesus, when I went into Macedonia, that thou mightest charge some that they teach no other doctrine, Neither give heed to fables and endless genealogies, which minister questions, rather than godly edifying which is in faith: so do. (1 Timothy 1:3,4)";

​

var matches = _bibleRefRegex.Matches(paragraph);

Console.WriteLine(matches.Count);

    }

}

​

​