I hope you can help me as searching on Google has not helped that much. My father passed away in February. I wondered whether anyone knew whether the soul can take Sannyasa? My father identified with Hinduism and was cremated (by chance) on Mahashivaratri. I just hope someone can answer my question or direct me to any texts that may help me.
This is a good question. Hindu scriptures warn everyone to start working for moksha while in good health. It is too late once death arrives.
Number of births and importance of human birth
In the eighty four lacs of bodies of creatures one does not acquire true knowledge anywhere unless one is born as a man.
Here, after thousands of crores of births a creature obtains human form only sometime due to aggregate of virtue.
Having obtained a rare human form he should endeavour for moksha. If he does not endeavour for it, there can be no greater sinner in the world.
Born in the most beautiful human form he incurs the sin of slaying a Brahmin if he neglects his self.
Without human body it is not possible to obtain the supreme goal. One should be, therefore, very cautious to guard wealth in the form of his body and perform good actions.
So far as this body remains intact he should practice dharma. One is a perfect fool who digs a well only when the house is on fire.
[Garuda Purana, Dharma Khanda, Chapter XLIX]