The famous Deobandi Saʿīd Pālanpūrī writes in the third volume of his 'Tuḥfat al-Almaʿī Sharḥ Sunan al-Tirmidhī':
Benefit:
Some people engage in contemplation [murāqabah] at graves, sitting for hours with bowed heads, while some perform dhikr jahrī. All such practices are unsubstantiated and innovations, from which one must refrain.
In these matters, the actions of any individual saint or elder do not constitute proof. The true proof lies in the Quran, the Sunnah, and the established practice of the first three generations.
When Ḥājī Imdād-Allāh (may Allāh sanctify his secret) published his treatise 'Fayṣalah Haft Masalah' and it was presented to [Rashīd Aḥmad] Gangohī, he did not even touch it. Rather, he said to the student: “Dump it into the bathhouse.”
He further remarked:
“We pledged allegiance to Ḥājī Ṣāḥib in the path of Ṭarīqah, not in Shariah.”
And it true that some individuals, in extreme old age, incline towards certain innovations. Therefore, if the practice of the elders conforms to the Quran and Sunnah, it is upon our heads and eyes [i.e., accepted]; but if not, fling the defective goods to the owner's beard [i.e., rejection].