Shiva Purana
तं दृष्ट्वा पितरं ब्रह्मा ब्रह्मणो ऽधिपतिं पतिम् ॥ प्रणम्य परमज्ञानं गायत्र्या सह लब्धवान् ॥ ६ ॥
Lord Brahmā saw his father, the master of all brāhmaṇas. He bowed down and attained supreme knowledge with Gayatri.
english translation
taM dRSTvA pitaraM brahmA brahmaNo 'dhipatiM patim ॥ praNamya paramajJAnaM gAyatryA saha labdhavAn ॥ 6 ॥
hk transliteration by Sanscript