بِسْمِ اللهِ الرَّحْمٰنِ الرَّحِيْمِ

• Sayyid Sistani says:

• As an obligatory precaution, if one intentionally weeps, silently or loudly, over some worldly matters, his namaz will be void. But, if he weeps silently or loudly due to fear of Allah, or for the Hereafter, there is no harm in it. In fact, it is among the best acts.

• Sayyid Kho’i elaborated slightly more:

• One who intentionally weeps loudly in connection with worldly affairs, his prayers will be nullified. and the obligatory precaution is that he should not weep for worldly affairs even without voice. However, if he weeps with or without voice, on account of fear of Allah or for the Hereafter there is no harm in it and in fact it is one of the best acts which a person performs.

So it seems it comes down to niyyah and fair judgment . The Conclusion is :

If someone remembers a personal loss, like a failed business deal, and weeps during prayer, this would invalidate the prayer according to the rulings of both scholars.

If someone is moved by the verses of the Quran recited during prayer and begins to weep out of fear of Allah’s punishment or awe of His greatness, this weeping is permissible and even encouraged.

If an individual is contemplating their deeds and the state of their soul, leading to tears of repentance or longing for Allah’s mercy, this weeping is permissible

Sayyid Kho’i’s ruling indicates that as an obligatory precaution, one should avoid even silent weeping over worldly matters to maintain the purity and focus of the prayer.

~Jazakallah