TA SIN. THESE are the verses of the Qur'an, and collection of explicit laws,
1
Tafseer
'Abdullāh Ibn 'Abbās / Muḥammad al-Fīrūzabādī
تفسير : and from his narration on the authority of ibn 'abbas that he said regarding the interpretation of allah's saying (ta. sin.): '(ta. sin.) he says: the (ta) stands for his might (tawluh) and the (sin) stands for his majesty (sana'uh); it is also said that it is an oath by which allah swore. (these are revelations of the qur'an and a scripture that maketh plain) this surah consists of verses of the qur'an and it is a book that makes plain the lawful and the unlawful;
Jalāl al-Dīn al-Maḥallī
تفسير : tā sīn: god knows best what he means by these [letters]. those, namely, these signs, are the signs of the qur’ān, signs from it, and a manifest book, manifesting [what is] truth from [what is] falsehood (wa-kitābin, ‘book’, is a supplement [to al-qur’ān] with the addition of an adjective [mubīn, ‘manifest’]).