Bhagavad Gita · Jnana Karma Sannyasa YogaChapter 4, Shloka 12 (4.12)

The lure of quickness. Kṣipram — quickly. Material results (wealth, children, success) show up quickly; liberation comes slowly, and within.

Shankaracharya: bhinna-devatā-yājinām phalākāṅkṣiṇām — to those who worship separate gods and desire results, results come quickly. He quotes the Brihadaranyaka (1.4.10): atha yo 'nyāṃ devatām upāste anyo 'sāv anyo 'ham asmīti na sa veda yathā paśur evaṃ sa devānām — one who worships a god thinking it separate from himself does not know; he is like an animal to the gods. (According to Shankara, it is in the human world alone that there is eligibility for actions of varna, ashrama and so on, and their quick results.)

Acharya Ramanuja: sarva eva puruṣāḥ karmaṇāṃ phalaṃ kāṅkṣamāṇāḥ indrādi-devatāḥ … yajante; na tu kaścid anabhisaṃhita-phalaḥ indrādi-devatātma-bhūtaṃ sarva-yajñānāṃ bhoktāraṃ māṃ yajate — all people, wanting results, worship Indra and the other gods; no one, without desire for results, worships me — the inner self of Indra and the others, the enjoyer of all yajñas. The reason: because of a store of sins from beginningless time, aviveka (lack of discernment) and kṣipra-phalābhikāṅkṣā — the craving for quick results; na tu kaścit saṃsārodvigna-hṛdayo mumukṣuḥ — rare indeed is the seeker of liberation whose heart is stirred by the sorrow of worldly existence.