Bhagavad Gita 18.8 Chapter 18, Verse 8

दुःखमित्येव यत्कर्म कायक्लेशभयात्त्यजेत् ।
स कृत्वा राजसं त्यागं नैव त्यागफलं लभेत् ॥१८.८॥

duḥkhamityeva yatkarma kāyakleśabhayāttyajet
sa kṛtvā rājasaṃ tyāgaṃ naiva tyāgaphalaṃ labhet

Meaning

One who abandons a duty because it is painful, out of fear of bodily hardship, performs rajasic relinquishment and does not gain its fruit.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 18.8 (Chapter 18, Liberation through Renunciation (Moksha Sannyasa Yoga), Verse 8)