Complex sentence: Ravana used to store the blood of sages he killed in a large pot. Once sage Gritsamada was practicing penance to acquire goddess Lakshmi as his daughter and stored milk from Darbha grass, purified with mantras in a pot so that Lakshmi would inhabit it.
Split into simpler sentences: Ravana used to store the blood of sages he killed in a large pot. The sage Gritsamada was practicing penance to acquire the goddess Lakshmi as his daughter. He stored milk from Darbha grass and purified it with mantras in a pot so that Lakshmi would inhabit it.