Is there such thing for rajab:

It is recommended to offer, after the obligatory Maghrib Prayer, a twenty unit prayer and to recite in each unit Surah al-Faatehah once and Surah al-Tawheed once, and to separate between each couple of units with Taslim. Whoever offers this prayer, his family members, property, sons, and he will be kept saved from harm, rescued against the grave torture, and pass the Sirat as swiftly as lightning without being called to account.