The above rule is only applied where the possibility of...

The above rule is only applied where the possibility of confusion is safeguarded against like the saying ‘the hole of a lizard is destroyed’ for it is necessarily known that that destruction is not attributed to a lizard, rather, it is to a hole, whereas there are no safeguards against confusion in this verse.

The [rule of the] genitive case being inserted based on the word closest to it is applicable [only] when there is no conjunction; as for when there is a conjunction the Arabs do not use it." And, al-Razi [further] said: "As for the reading [of the feet in the verse] being in the accusative case, they have said that this also requires the wiping, and that is because of His saying `and wipe your heads,' the [word] head [in the sentence] is in an accusative position, due to the command `wipe', as it (the head) is the object [in the sentence]; but, it is [written] in the genitive case due to the preposition ba.

So if `the feet' are conjoined to `the head' [in the sentence] then we are allowed to read `the feet' in the accusative case, as it is conjoined to the position of the head [which is in the accusative case in the sentence].

We are [also] allowed to read it in the genitive case as a conjunction (to the apparent preposition)." He said: "If this is clear, then we say it is clear for us that it is permissible that the `amil (a word governing another in syntactical regimen) of the accusative in His saying `...and your feet....' be His saying `wipe.' [However] it is permissible that [the 'amil] be His saying `wash' but if the two `amils are combined on one word, then the closest one is the best [to use]." He said: "It is obligatory that the 'amil of the accusative in His saying `and your feet' be His command `wipe.'" (Al-Razi said): "So it is clear that the recitation of `and your feet' in the accusative also leads to the wiping [of the feet].

Then they [objected] saying it is not permissible to defend it (the wiping) by traditions because all of them are in the form of singular traditions, and the abrogation of the Qur'an by a singular tradition [only one saying- ‘hadith’ supporting the claim] is not allowed." This is his speech word to word, nothing is left out, but he (al-Razi) further said: "There are many traditions reported on the obligation of washing. Washing [the feet] includes the wiping whereas the opposite is not the case.

Therefore washing is closer to observing caution. So, it is necessary to opt for it (washing).