Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Moksha-Sanyasa Yoga Chapter 18, Verse 18.38.
Sanskrit
विषयेन्द्रियसंयोगाद्यत्तदग्रेऽमृतोपमम् । परिणामे विषमिव तत्सुखं राजसं स्मृतम् ॥ १८.३८ ॥
Hindi
जो सुख विजय और इन्द्रियों के संयोग से होता है, वह पहले —-भोग काल में अमृत के तुल्य प्रतीत होने पर भी परिणाम में विष के तुल्य है ; इसलिये वह सुख राजस कहा गया है ।
English
However O Arjuna, pleasure which is derived immediately from the contact of the senses with their objects, appears to the human senses as the sweet nectar at first, but later it is discovered to be nothing more than poison to one’s own being. This pleasure is known as the Rajas pleasure of passion.