Taittirīya Upaniṣad 1.11.2

1.11.2

devapitṛkāryābhyāṃ na pramaditavyam /
mātṛdevo bhava /
pitṛdevo bhava /
ācāryadevo bhava /
atithidevo bhava /
yānyanavadyāni karmāṇi /
tāni sevitavyāni /
no itarāṇi /
yānyasmākam̐ sucaritāni /
tāni tvayopāsyāni // 2//

2. One should not be negligent of duties to the gods and to the fathers. Be one to whom a mother is as a god. Be one to whom a father is as a god.

Be one to whom a teacher is as a god. Be one to whom a guest is as a god. Those acts which are irreproachable should be practised, and no others. Those things which among us are good deeds should be revered by you, and no others. Whatever Brahmans (brāhmaṇa) are superior to us, for them refreshment should be procured by you with a seat. One should give with faith (śraddhā). One should not give without faith. One should give with plenty (śrī). One should give with modesty. One should give with fear. One should give with sympathy (saṃ-vid).