Bhagavad Gita Chapter 17, Verse 25

तदित्यनभिसन्धाय फलं यज्ञतपःक्रियाः | दानक्रियाश्च विविधाः क्रियन्ते मोक्षकाङ्क्षिभिः ||

tad ity anabhisandhāya phalaṁ yajña-tapaḥ-kriyāḥ dāna-kriyāś ca vividhāḥ kriyante mokṣa-kāṅkṣibhiḥ

Uttering 'TAT,' without desiring results, the various actions of sacrifice, austerity, and charity are performed by those who desire liberation.

Krishna explains how TAT is used in spiritual practices. 'Tad ity anabhisandhāya phalaṁ'—uttering (iti) 'TAT' (tat), without desiring (anabhisandhāya) results (phalam). 'Yajña-tapaḥ-kriyāḥ dāna-kriyāś ca vividhāḥ kriyante'—the various (vividhāḥ) actions (kriyāḥ) of sacrifice (yajña), austerity (tapas), and charity (dāna) are performed (kriyante). 'Mokṣa-kāṅkṣibhiḥ'—by those who desire liberation (mokṣa-kāṅkṣibhiḥ). TAT means 'That'—the Supreme Reality. When you utter TAT, you offer your actions to the Supreme, without desiring results. Those who desire liberation perform actions with TAT, dedicating them to the Supreme without attachment. Understanding this helps you recognize the importance of TAT in dedicating actions to the Supreme.