SALATU ‘R-RAQHA’IB. صلاة الرقاب
“A prayer for things desired.” Two rak’ah prayers recited by one who desires some object In this world. According to the orthodox, it is forbidden in Islam. (Raddu ‘l-Muthar, vol. i. p 717.) it is recited by some persons in the first week of the month Rajab.
Based on Hughes, Dictionary of Islam