4:16  

किं कर्म किमकर्मेति कवयोऽप्यत्र मोहिताः ।
तत्ते कर्म प्रवक्ष्यामि यज्ज्ञात्वा मोक्ष्यसेऽशुभात् ॥४-१६॥

kiM karma kimakarmeti kawayo'pyatra mohitaaH ।

tatte karma prawakShyaami yajdnyaatwaa mokShyase'shubhaat ॥४-१६॥

Source: Automatic ITRANS Transliteration

What is action? What is inaction? This bewilders even the intelligent.
Therefore, I will expound upon that action knowing which one escapes from evil.

Source: Milind S. Pandit

Even the wise are confused about what is action and what is inaction. Therefore, I shall clearly explain what is action, knowing that one shall be liberated from the evil (of birth and death).

Source: The Bhagavad-Gita: The Sacred Song

Even the intelligent are bewildered in determining what is action and what is inaction. Now I shall explain to you what action is, knowing which you shall be liberated from all sins.

Source: Bhagavad Gita As It Is