Bhagavad-Gita The Song Divine Chapter 9 (stanza 22-34)

The devotees, however, who loving no one else constantly think of Me, and worship Me in a disinterested  spirit, to those ever united in thought with Me. I bring full security and personally attain to their needs.  ………… (22)

Arjun, even those devotees who, endowed with faith, worship other gods (with some interested motive) worship Me alone, though with a mistaken approach.  ,,,,, (23)

For, I am the enjoyer and also the lord of all sacrifices; but they who do not know Me in reality as the Supreme Deity, they fall i.e., return to life on earth. ……….. (24)

Those who are votaries of gods, go to gods, those who are votaries of manes, reach the manes; those who adore the spirits, reach the spirits and those who worship Me, come to Me alone. That is why My devotees are no longer subject to birth and death. …… (25)

Whosoever offers Me with love a leaf, a flower, a fruit or water, I appear in person before that selfless devotee of sinless mind, and delightfully partake of that article offered by him with love. ………… (26)

Arjun, whatever you do, whatever you eat, whatever you offer as oblation to the sacred fire, whatever you bestow as a gift, whatever you do by way of penance, offer all that to Me. (27)

With your mind thus established in the Yoga of renunciation (offering of all actions to Me) you will be freed from the bondage of action in the form of good and evil results; thus freed from them, you will attain Me. …………. (28)

I am equally present in all beings; there is none hateful or dear to me. They, however, who devoutly worship Me abide in Me; and I too stand revealed to them. ……. (29)

Even if the vilest sinner worships Me with exclusive devotion, he should be regarded a saint; for, he has rightly resolved. (He is positive in his belief that there is nothing like devoted worship of God) …………… (30)

Speedily he becomes virtuous and attains abiding peace. Know it for certain, Arjun that My devotee never perishes. …….. (31)

Arjun, women, Vaisyas (members of the trading and agriculturist classes), Sudras (those belonging to the labor and artisan classes) as well as those of impious birth (such as a pariah), whoever they may be, taking refuge in Me, they too attain the supreme goal … (32)

How much more, then, if they be holy Brahmans and royal sages devoted to me! Therefore, having obtained this joyless and transient human life, constantly worship Me …….. (33)

Fix your mind on Me, be devoted to me, worship Me and make obeisance to Me; thus linking yourself with Me and entirely depending on Me, you shall come to Me. …. (34)

Thus, in the Upanishad sung by the Lord, the Science of Brahma, the scripture of Yoga, the dialogue between Sri Krishna and Arjun, ends the ninth chapter entitled "The Yoga of Sovereign Science and Sovereign Secret."