Is doing the du`a of Sayyidina Dawud (as) on a specific person haram? Is there any other wazifas that are to attract a suitable partner?
A`udhu billahi min ash-shaytan ir-rajeem
Bismillahi ‘r-Rahmani ‘r-Raheem
wa `alaykum salam,
There is permission to use the dua of Sayyidina Dawud (as). See also the wazifa given here.