Arthashastra
तीर्थ गूहन आगमने षण् णवतिर् दण्डः ॥
In case of his concealing the fact of her being in menses or neglecting to lie with any of them after her menses, he shall pay a fine of 96 panas.
english translation
tIrtha gUhana Agamane SaN Navatir daNDaH ॥
hk transliteration by Sanscript