There is a famous ugabogha written by sri purandara dasaru on viladhale(betel nuts). One,two or three betel leaves should not be given in tamboolam to suhasini or purusharu or anyone when you do dhaana ,dharma, moradha bhagina, pooja or for any cause. 

It is must to give minimum 4 or 5 betel leaves(viladhale) for getting good benifits(Pala)

Ondu Villedeleya viprarigendendu koda baaradu

Eradele Kodalu kuNdi Hoguvudu Bhaagya

Moorele kodalu Bandodagavudu haani

chandadindali Nalku Aidele tandhu

Kottare thande Purandara Vittala

Vaikunta padaviya veevA