అదయి ౯  శ్లోక  ౨౧

Chapter – 9 – Shloka – 21

However, Arjuna, after all of their good Karma (action) has expired, the enjoyment of all of the happiness, joy and peace that they have encountered in heaven ends as well, and therefore, they are reborn in the world (subject to the cycle of birth and death) once more.

Therefore, Arjuna, all beings who perform attached Karma (actions performed for the purpose of gaining something, i.e. fruits, in return for the action), are always born and reborn into this cycle of birth and death according to the three Vedas.

वे उस विशाल स्वर्ग लोक को भोग कर पुण्य क्षीण होने पर मृत्यु लोक को प्राप्त होते है । इस प्रकार स्वर्ग के साधन रुप तीनो वेदो मे कहे हुए सकाम कर्म का आश्रय लेने वाले और भोगो की कामना वाले पुरुष बार-बार आवागमन को प्राप्त होते है अर्थात् पुण्य के प्रभाव से स्वर्ग मे जाते है और पुण्य क्षीण होने पर मृत्यु लोक मे आते है  ।। २१ ।।

The Gita in Sanskrit, Hindi, Gujarati, Marathi, Nepali and English – The Gita.net