The order of the Navagrahas is as follows:
Rahu and Ketu.
Soorya souryamadendhurucha padaveem , sanmangalam mangala,¬ Sad budhim cha budho Guruscha kurutham Shukra sukham , sam sani,¬ Rahur bahu balam karothu vipulam Kethukulasyonnathim,¬ Nithyam preethikara bhavanthu bhavatham sarve prasanna Graha
Let sun give me courage , Moon give high position , Mars grant auspiciousness,¬ Let mercury give good brain , Let Jupiter give great numbers , Venus give pleasure ,Sani peace, Rahu give me physical strength and Kethu greatness of our family,¬ And let all the planets be pleased with me and start liking me.¬
So,the most natural way of associating the nine numbers 1,2..to..9 with the Navagrahas is this:
Sun-1,Moon-2,Mars-3,Mercury-4,Jupiter-5,Venus-6,Saturn-7,Rahu-8 and Ketu-9.
But those who are familiar with the subject of Numerology will know that this is not quite the order that is followed .
In numerology they follow this:
So,quite different from the association given further above.
Which Hindu Scriptures give these rules of Numerology and in particular the rules regarding which number is to be associated with which of the Navagrahas?