Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Moksha-Sanyasa Yoga Chapter 18, Verse 18.8.
Sanskrit
दुःखमित्येव यत्कर्म कायक्लेशभयात्त्यजेत् । स कृत्वा राजसं त्यागं नैव त्यागफलं लभेत् ॥ १८.८ ॥
Hindi
जो कुछ कर्म है, वह सब दुःख रूप ही है —– ऐसा समझ कर यदि कोई शारीरिक क्लेश के भय से कर्तव्य कर्मों का त्याग कर दे, तो वह ऐसा राजस त्याग करके त्याग के फल को किसी प्रकार भी नहीं पाता|
English
O Arjuna, he who abandons his duties because he fears that some discomfort or pain will come to him by performing these duties, is of the Rajas Guna (nature) and his way of surrendering from work is a sign of this nature within him. You must realize, O Arjuna, that person actually accomplishes nothing when he performs his various tasks.