Caitanya-caritāmṛta 25.94
praṇavera yei artha, gāyatrīte sei haya sei artha catuḥ-ślokīte vivariyā kaya
[pranavera yei artha, gaayatreete sei haya sei artha chatuh-shlokeete vivariyaa kaya]
Blended reading (Sanskrit + English inline)
praṇavera yei artha, gāyatrīte sei haya sei artha catuḥ-ślokīte vivariyā kaya
“The meaning of the sound vibration oṁkāra is present in the Gāyatrī mantra. The same is elaborately explained in the four ślokas of Śrīmad-Bhāgavatam known as the catuḥ-ślokī.
My note
Source: vedabase.io