Reading from the books of tafseer while in the state of impurity

Question:
I read books of Tafseer of the Qur'an when I am not in a state of purity... such as during my monthly period, is there any objection to this, and am I committing any sin by doing so? Please deliver a verdict, and may Allah reward you.

The best books on Aqeedah (Islamic Creed)

Q. What are the best Islamic books for those who want to perfect their Iman (belief) and ‘Aqidah (creed) and to meet Allah (Exalted be He) while He be pleased with them?

A. The most important book in `Aqidah is the Qur’an; it is the most truthful, the greatest and the noblest book. You should adhere to it as much as possible and recite it often. It includes `Aqidah, guidance to goodness and warning against evil. If you read it carefully out of desire to learn and follow its instructions closely, whether in words, deeds or `Aqidah, you will find all goodness in it from the beginning to the end i.e. from Surah Al-Fatihah [Surah (1)] toSurah Al-Nas, 114: 1 Say: “I seek refuge with (Allah) the Lord of mankind, If you contemplate this great book and recite it often, you will comprehend the `Aqidah which Allah (Exalted be He) accept from you and from the Mu’mins (believers).

What is 'Aqeedah?

Aqeedah refers to those matters which are believed in, with certainty and conviction, in one’s heart and soul. They are not tainted with any doubt or uncertainty.

The Arabic word ‘aqeedah stems from the root ‘aqada, which conveys meanings of certainty, affirmation, confirmation, etc.

In the Qur’aan, Allaah says: "Allaah will not punish you for what is unintentional in your oaths, but He will punish you for your deliberate oaths (bimaa ‘aqqadtum al-aymaan)…"
[al-Maa’idah 5:87]