Revākhaṇḍa ascribed to the Vāyupurāṇa (RKV) 156.43

156.43

sa labhennātra sandehaḥ satyaṃ satyaṃ punaḥ punaḥ /
putrārthī labhate putraṃ dhanārthī labhate dhanam //

he will obtain it; there is no doubt about this, it is true, true again and again. / A seeker of a son obtains a son; a seeker of wealth obtains wealth;