It is not permissible to use
Tawassul (supplicating to Allah) by virtue of the status of the prophets or other people. For example saying 'I ask You by virtue of Your prophets' is an oath by means of creation that Allah should do something. It is a Bid`ah (innovation in religion) and a means to Shirk. It is permissible for a Muslim to seek help by Allah's Names, Attributes, and belief in Him, and by virtue of their good deeds.May Allah grant us success. May peace and blessings of Allah be upon our Prophet Muhammad, his family and Companions!