Chapter 18 · Liberation through Renunciation · Krishna said
Bhagavad Gita 18.4 — Three kinds of letting go
निश्चयं शृणु मे तत्र त्यागे भरतसत्तम। त्यागो हि पुरुषव्याघ्र त्रिविधः सम्प्रकीर्तितः ॥
niścayaṃ śṛṇu me tatra tyāge bharatasattama | tyāgo hi puruṣavyāghra trividhaḥ samprakīrtitaḥ ||
Meaning
O best of the Bharatas, hear My final word on letting go. O tiger among men, it is said to be of three kinds.