Nasai

181. Commentary: From the above-mentioned hadiths, it is understood that one should perform ablution (wudu) after eating something cooked over fire. However, it is difficult to interpret this command as obligatory, because ablution is nullified by the emission of something impure, not by eating something pure, as Abdullah ibn Abbas radi Allahu anhuma expressed in Hadith number 174. Therefore, these hadiths will either be interpreted as recommending (mustahabb) ablution, or this ruling has been abrogated, as is evident from the hadiths in the following chapter, which show that in the early period the Prophet sallallahu alayhi wa sallam gave this command, but later he himself did not act upon it (see: Hadith 185). The noble Companions radi Allahu anhum also abandoned this practice, and this is the position of the majority of jurists and hadith scholars, and this is the preferred view. And Allah knows best.