Agniveshyagrihyasutra 2.5.3.1

2.5.3.1

āhutānukṛtirāyuṣyahomacaruḥ saṃvatsare saṃvatsare ṣaṭsu ṣaṭsu māseṣu caturṣu caturṣu māseṣu māsi māsi vā janmanakṣatre kriyeta \

The imitation of offerings is the longevity oblation caru; it should be performed every year, every six months, every four months, or month by month on the birth asterism.