Thag 1.4

sabbhi'r'eva samāsetha, paṇḍiteh'atthadassibhi, atthaṃ mahantaṃ gambhīraṃ, duddasaṃ nipuṇaṃ aṇuṃ, dhīrā samadhigacchanti, appamattā vicakkhaṇā'ti.

SN 1.45

anomanāmaṃ nipuṇ'atthadassiṃ, paññādadaṃ kām'ālaye asattaṃ, taṃ passatha sabbaviduṃ sumedhaṃ, ariye pathe kamamānaṃ mahesin'ti.

AN 5.59

dullabho, bhikkhave, vuḍḍhapabbajito nipuṇo, dullabho ākappasampanno, dullabho bahussuto, dullabho dhammakathiko, dullabho vinayadharo.

MN 27

katamāni cattāri? idh'āhaṃ, bho, passāmi ekacce khattiyapaṇḍite nipuṇe kataparappavāde vālavedhirūpe, te bhindantā maññe caranti paññāgatena diṭṭhigatāni.