How strange… he forgets his Rabb and worships the dead

Ibn Taymiyyah رحمه الله stated:

وَالْعَجَبُ مِنْ ذِي عَقْلٍ سَلِيمٍ يَسْتَوْحِي مَنْ هُوَ مَيِّتٌ وَيَسْتَغِيثُ بِهِ وَلَا يَسْتَغِيثُ بِالْحَيِّ الَّذِي لَا يَمُوتُ فَيَقُولُ أَحَدُهُمْ إذَا كَانَتْ لَك حَاجَةٌ إلَى مَلِكٍ تَوَسَّلْت إلَيْهِ بِأَعْوَانِهِ فَهَكَذَا يَتَوَسَّلُ إلَيْهِ بِالشُّيُوخِ وَهَذَا كَلَامُ أَهْلِ الشِّرْكِ وَالضَّلَالِ

It is strange for one of sound mind to resort to one who has died and to seek his aid, but not seek the aid of the Living who does not die. One of them says: If you have a need, use them as a means of help. Likewise, he uses scholars as a means. These are the words of the people of idolatry and misguidance.

Majmū’ al-Fatāwá 18/322