About building database for persian speech to text project
You may want to consider using Persian songs which have the lyrics (i.e. متن) readily available as well. There are also Islamic eulogies, known as noheh (نوحه), which are essentially poems recited somewhat similar to songs and sometimes include the written poem (i.e. نسخه).
Some examples:
https://bit.ly/2FRnI0g
https://bit.ly/3mKpj8W