Is it essential to wash the blood from feminine pads before throwing them away?

Question

Praise be to Allah.

None of the trustworthy scholars have stated that a woman has
to wash her feminine rags or pads which may have traces of menstrual blood,
if she is going to throw them away and not use them again. Rather it seems
that the women of the Sahaabah did not wash these pads; the Prophet
(peace and blessings of Allaah be upon him) knew about that and it is not
narrated that he told them off for that. Al-Tirmidhi (61) and other authors
of Sunan narrated that Abu Sa’eed al-Khudri said: “It was said, ‘O Messenger
of Allaah, should I do wudoo’ from the well of Budaa’ah?’ – which was a well
into which were thrown menstrual rags, the flesh of dogs and other putrid
things. The Messenger of Allaah (peace and blessings of Allaah be upon
him) said: ‘Water is pure and nothing makes it naajis (impure).” This is a
saheeh hadeeth which was classed as such by Ahmad, Yahya ibn Ma’een, Ibn
Khuzaymah, Ibn Taymiyah and others (may Allaah have mercy on them).

What is referred to here by “menstrual rags” is the rags
which were used for menstrual blood, as al-Mubaarakfoori said in his
commentary on this hadeeth. So it seems that they used to throw them away
when they were contaminated with blood, otherwise the Sahaabah would not
have raised the issue of whether the water into which these rags were thrown
was taahir (pure) or not.

There is no sound basis for what your friends have said;
rather it is a myth which has no basis. Such notions are widespread among
the common folk, so you have to ask for proof and evidence, and refer to the
scholars and books of knowledge. You have to reject these myths and warn
people against them. Each person must protect himself against the evils of
the devils among mankind and the jinn by remembering Allaah a great deal
(dhikr), reciting Qur’aan and adhering steadfastly to the commands of
sharee’ah, and keeping away from myths and stories that have no proof. And
Allaah knows best.