One verse

Srimad Bhagavatam 11.11.18

11.11.18

शब्दब्रह्मणि निष्णातो न निष्णायात् परे यदि । श्रमस्तस्य श्रमफलो ह्यधेनुमिव रक्षत: ॥ १८ ॥

śabda-brahmaṇi niṣṇāto na niṣṇāyāt pare yadi śramas tasya śrama-phalo hy adhenum iva rakṣataḥ

śabda-brahmaṇi
in the Vedic literature
niṣṇātaḥ
expert through complete study
na niṣṇāyāt
does not absorb the mind
pare
in the Supreme
yadi
if
śramaḥ
labor
tasya
his
śrama
of great endeavor
phalaḥ
the fruit
hi
certainly
adhenum
a cow that gives no milk
iva
like
rakṣataḥ
of one who is taking care of

If through meticulous study one becomes expert in reading Vedic literature but makes no endeavor to fix one’s mind on the Supreme Personality of Godhead, then one’s endeavor is certainly like that of a man who works very hard to take care of a cow that gives no milk. In other words, the fruit of one’s laborious study of Vedic knowledge will simply be the labor itself. There will be no other tangible result.