Sn 992 does not seem to be a standard reference.
Is it supposed to be a text from Sutta Nipata (Snp) or a Samyutta Nikaya (SN) collection?
This is the link I usually look at when reconciling the more standard collection + sutta number references with the more obscure PTS volume and page number reference type.
https://www.ancient-buddhist-texts.net/Reference/Sutta-PTS.htm
Maybe this is something we find in commentaries?
If that is the case, we may need help of people like venerable @dhammanando who usually is able to find stuff in those paracanonic texts. A possible source is 84000.org
Also, is it the case you got this quote from some material associated with Bhikkhu Katukurunde? It is found in one of the quotes presented in the topic below, but unfortunately not identified.
