दर्शनाच्च ॥ २० ॥
darśanācca || 20 ||
darśanāt—On account of observation; ca—also.
20. Also on account of observation.
That this rule about the five oblations is not universal is also seen from the fact that of the four kinds of life, viviparous, oviparous, life springing from moisture, and plant life, the last two are born without any mating and consequently there is not the fifth oblation in their case.