Ash-Shaykh Abdul Azeez Ar-Raajihi, may Allah preserve him, said:
… واختلف العلماء في عدد الكبائر وفي
حدها، قال بعضهم: هي سبع، قال بعضهم: هي سبعون، وقال بعضهم: هي سبعمائة، قال بعضهم: هي ما اتفقت الشرائع على تحريمه.
“The scholars have differed on the number of major sins there are and have differed pertaining to its definement; some have said it is only seven major sins, and some have said there are seventy major sins, and some have said there are seven hundred major sins, and others have said it is what all the religions have come to an agreement upon its prohibition”
Reference: al-Ajwibah Mufeedah an Masaa’il Adeedah.
And some scholars mentioned that it is four hundred and sixty. Allah knows best.
AbdulFattaah bin Uthman