[The ruling on someone who prays and then finds at the end of the time something like a dot on his forearm that the water did not reach]

The answer, and Allah is the Grantor of success: If a Muslim performs ablution as Allah Almighty has commanded him and prays, then at the end of the time he sees something like a drop of dough or something similar on his forearm that the water has not reached underneath, then what appears to me is that he is not required to wash it off and repeat the prayer. This is because: 1. The scholars of the madhhab and others did not require a woman to remove what she wears on her face for adornment, even though it prevents the water from reaching what is underneath. Rather, they validated her prayer and based this on the custom of Muslims. 2. It is not within a person’s power to guard against mistakes and forgetfulness, and this is why Allah Almighty said: {There is no blame upon you for that in which you have erred but [only] for what your hearts intended.} [Al-Ahzab: 5] .

If it is said: The person responsible does not escape the responsibility of the matter by forgetting, but rather he must do it in order to escape the responsibility.
We said: In our case, the person obligated to do so did what he was commanded to do, and followed the traces of dough and similar parts of his body and removed them, and something like a dot went astray from him and he did not discover it until the end of the time. So his ruling is not the ruling of someone who completely forgot to do what he was commanded to do, since he complied with the command and investigated and investigated thoroughly, and with this he was released from the obligation, and there is no blame upon him for what was beyond his capacity.
3 - It is said of someone who does this: He washed his hands up to the elbows, linguistically and conventionally. Hence, we say: Such ablution is valid.
4 - It was narrated on the authority of some scholars that washing most of a limb is sufficient, based on the fact that linguists consider most of something to be like the whole thing.
If it is said: It was narrated that the Prophet (peace and blessings be upon him) saw a man praying in the mosque, so the Prophet (peace and blessings be upon him) said to him: “O man, I see that the heel of your foot is dry, so if water has touched it, then wash it off.” So Ali (peace be upon him) said to the Prophet (peace and blessings be upon him) something to the effect of:لو صلى هذا الرجل هكذا هل تكون صلاته صحيحة؟) فقال : «لا ... ».
We said: The one who leaves his heel behind is excessively pure, lenient, and negligent; unlike what we are talking about; for none of that happened from him.