4. Pubbakoṭṭhakasuttavaṇṇanā

[514] Catutthe amatogadhanti amatabbhantaraṃ. Amataparāyananti amatanibbattikaṃ. Amatapariyosānanti amataniṭṭhaṃ. Sādhu sādhūti therassa byākaraṇaṃ pasaṃsanto sādhukāraṃ deti.