Rig Veda
प्रा॒तर्य॑जध्वम॒श्विना॑ हिनोत॒ न सा॒यम॑स्ति देव॒या अजु॑ष्टम् । उ॒तान्यो अ॒स्मद्य॑जते॒ वि चाव॒: पूर्व॑:पूर्वो॒ यज॑मानो॒ वनी॑यान् ॥ प्रातर्यजध्वमश्विना हिनोत न सायमस्ति देवया अजुष्टम् । उतान्यो अस्मद्यजते वि चावः पूर्वःपूर्वो यजमानो वनीयान् ॥
Worship the Aśvins at early dawn; offer their oblations; the evening is not for the gods; it is unacceptable to them; and whether it be any other than ourselves who worship them or propitiates them, the worshipper who is foremost (in his devotion) is the most approved of.
english translation