Bhagavad Gita 18.36
Hear further the three kinds of pleasure. That which increases day by day delivers one from misery.
सुखं त्विदानीं त्रिविधं श्रृणु मे भरतर्षभ।अभ्यासाद्रमते यत्र दुःखान्तं च निगच्छति॥sukhaṃ tvidānīṃ trividhaṃ śrṛṇu me bharatarṣabha|abhyāsādramate yatra duḥkhāntaṃ ca nigacchati||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).