[exit example]
 
 \documentclass{article}
   \usepackage{amsmath}
 
   \input AmsTeX4ht.sty
 
   \Preamble{html}
   \ConfigureEnv{equation}
      {\HCode{<HR>}}{\HCode{<HR>}}{}{}
 
 \begin{document}    \EndPreamble
   \begin{equation}Psalms _ {131:1}
   \end{equation}
   My heart is not haughty,
   nor mine eyes lofty: neither
   do I exercise myself in great
   matters, or in things too high
   for me.
 \end{document}
[download source]
Non-simulated output:
mn-38.html

P salms131:1 (1)
 
My heart is not haughty, nor mine eyes lofty: neither do I exercise myself in great matters, or in things too high for me.