There is a worship for Couples to be inseparable. Couples who want to be united forever should make fast on thiruvonam star chanting 1008 names of lord perumal and should worship him in the evening. After sunset, couples should find the place of thiruvonam star in sky and should worship it.
This ritual will remove poverty through pithru blessings.One should rise early morning on this day and should light lamps which should produce light for atleast 3 hours continuously.
Thanks to agnisiksha archives.