Bhagavad Gita 4.39

श्रद्धावाँल्लभते ज्ञानं तत्पर: संयतेन्द्रिय: ।
ज्ञानं लब्ध्वा परां शान्तिमचिरेणाधिगच्छति  ॥

śraddhāvāl-labhate jñānaṃ tat-para: saṃyatendriya:
jñānaṃ labdhvā parāṃ śāntim-acireṇādhigacchati – 4.39  

One imbued with interest in Brahman, with senses under control and assiduously attentive, begets knowledge. After gaining knowledge, he attains supreme peace before long.