Bhagavad Gita: Chapter 14/Verse 9

सत्त्वं सुखे संजयति रजः कर्मणि भारत ।

ज्ञानमावृत्य तु तमः प्रमादे संजयत्युत ॥१४- ९॥

sattvaṃ sukhe saṃjayati rajaḥ karmaṇi bhārata ।

jñānamāvṛtya tu tamaḥ pramāde saṃjayatyuta ॥14- 9॥

Sattva causes attachment in happiness, rajas in action, Descendant of Bharata. But having obscured knowledge, tamas causes attachment in confusion, indeed. 

sattvam (neuter, nominative, singular) = sattva

sukhe (masculine/neuter, locative, singular) = in happiness

saṃjayati (present tense, 3rd person, singular) = it causes attachment 

rajas (neuter, nominative, singular) = rajas

karmaṇi (neuter, locative, singular) = in action 

bhārata (masculine, vocative, singular) = Descendant of Bharata 

jñānam (neuter, accusative, singular) = knowledge 

āvṛtya (gerund) (indeclinable) = having obscured 

tu (conjunction) (indeclinable) = but 

tamas (neuter, nominative, singular) = tamas 

pramāde (masculine, locative, singular) = in confusion 

saṃjayati (present tense, causative, 3rd person, singular) = it causes attachment

uta (adverb) (indeclinable) = indeed