Śatapatha Brāhmaṇa ("of a hundred paths") 7.3.2.8

7.3.2.8

taddhaike 'nvāhuḥ | purīṣyāso agnayaḥ prāvaṇabhiḥ sajoṣasa iti prāyaṇarūpaṃ na tathā kuryādāgneyīreva gāyatrīḥ kāmavatīranubrūyādā te vatso mano yamattubhyaṃ tā aṅgirastamāgniḥ priyeṣu dhāmasviti

Now some recite (Vâg. S. XII, 50), 'The Agnis Purîshyas, together with those of the streams,'--a form of starting. Let him not do so; let him recite gâyatrî verses addressed to Agni, and relating to (objects of) desire: (Vâg. S. XII, 115; Rik S. VIII, II, 7), 'Hither may Vatsa lead thy mind even from the highest seat, O Agni, with the song desirous of thee!'--(Vâg. S. XII, 116; Rik S. VIII, 43,18), 'To thee, O Agni, best of Aṅgiras, all good homesteads have laid themselves out for (the obtainment of) their desire.'--(Vâg. S. XII, 117), 'Agni, the one all-ruler, shineth in the beloved homes, the (object of) desire of all that is and shall be.'