A Segulah for Parnassah

Rav Kaduri taught a segulah for parnassah. One recites the following chapters of Tehillim for forty days in a row: chapters 20, 21, 23, 24, 29 and 91. After reciting them each day, one says the tefillah at the end. On the fortieth day one recites it at the Kosel if possible and lights a candle for Rav Meir Baal HaNess.