Yāska's Nirukta 5.3

5.3

āha-katame punante ?, ucyate “ apyupamārthe, api karmopasaṃgrahārthe, api padapūraṇāḥ ”| upamaivārthe upamārthaḥ, tasminnupamārthe| upamā nāma,- kasmiṃścidevārthe ya prasiddho
guṇaḥ, tadanyasminnaprasiddhastadguṇe'rthe śabdamātreṇa yadupasaṃyojya tadguṇaprakāśanaṃ kriyate sopamā|| karmopasaṃgraha evārthaḥ karmopasaṃgrahārthaḥ, tasmin karmopasaṃgrahārthe | arthopasaṃgrahārtha ityarthaḥ | karmaśabdo hi prāyeṇārthaparyāyavacana etasmiñcchāstre | “gatikarmāṇa uttare dhātavaḥ ( 3, nca. 9, 19 )”, gatyarthā iti gamyate || padameva pūrayitavyaṃ yeṣāmarthaḥ, te padapūraṇāḥ | tadetat tribhātvamarthabhedakṛtaṃ nipātānāṃ samāsena |
"athāpyukāra etasminnevārtha uttareṇa" | vinigrahārthe bhavati | sa punaruttareṇa dvitīyavākyagatenārthena saṃyuktaḥ prayujyate tadyathā, "mṛṣeme" vṛṣalāḥ "vadanti" "satyamute" brāhmaṇāḥ "vadantīti" | vinigraho nāma, vibhāgenāvasthitayoryajñadattadevadattayorekasminyajñadatte'bhimataigopāyanasya niyamena grahaṇaṃ ( yat sa vinigrahaḥ, ) tadartho vinigrahārthaḥ, vinigrahārtha eva vinigrahārthīyaḥ |