उदके मध्यरात्रे च विष्मूत्रस्य विसर्जने । उच्चिष्टः श्राद्धभुक् चएव मनसा-अपि न चिन्तयेत् ॥ ४-१०९ ॥
sanskrit
In water, during the middle part of the night, while he voids excrements, or is impure, and after he has partaken of a funeral dinner, a man must not even think in his heart (of the sacred texts).
english translation