[Tafsir Ruh ul Ma’ani, Volume 30]
Imam Ghazzali (rah) said that whenever anyone is in some difficulty then he should ask the people of tombs for help, who are of (sacred) souls but have passed away (i.e. transferred into another dimension). There is no doubt in it that any person visiting (their tombs) gets spiritual help plus benefit from them and many times when their Waseela is presented in the court of Allah, the difficulties are removed.