Ibn Taymiyyah cited the hadith, “Do not forget us, my brother, in your supplication,” but did not specify its grade, even though it is his custom to do so!

Question:
We say: Honorable Shaykh, may Allah grant you success, it is the custom of Shaykh al-Islam Ibn Taymiyyah (may Allah have mercy on him) to establish the authenticity or weakness of a hadith. So why did he not establish that for the hadith (may Allah have mercy on him)?

Answer:
Because there is a discussion regarding it; the hadith has a discussion, it is a weak hadith, yes. But he says, “If it is authentic,” and he conditions the ruling on its authenticity, because some scholars may say it is weak while it is not weak, yes. This is part of his caution (may Allah have mercy on him), his scrupulousness, and his carefulness, given the vast amount of knowledge he possessed.
As for us, regarding the length of the hadith, the hadith is invalid, the hadith is not authentic, the hadith is weak. We do not rush or hasten regarding the length of the hadith. It is not authentic. It is a weak hadith. It is either a weak hadith or an authentic one. Do not rush, my brother. Do not rush, my brother. And you have not reached this level, yes. The great Imams are cautious and verify when dealing with hadiths, yes.