Uda-kumbha means giving drinking water with the pot(Copper/Brass)
This is a visesha dhana usually given during Summer months(Chaithra maasa and Vaishaka maasa)
Chant this mantra and give dhana
Esha dharmaghato data brahma Vishnu shivathmakah
Asyapradhana thrupthyanthu pitharassa pithamaha
Madhwa 
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