Caitanya-caritāmṛta 13.165
bhāvera āveśe kabhu bhūmite vasiyā tarjanīte bhūme likhe adhomukha hañā
[bhaavera aaveshe kabhu bhoomite vasiyaa tarjaneete bhoome likhe adhomukha hanaa]
Blended reading (Sanskrit + English inline)
bhāvera āveśe kabhu bhūmite vasiyā tarjanīte bhūme likhe adhomukha hañā
In emotional ecstasy, Caitanya Mahāprabhu would sometimes sit on the ground and, looking down, would write on the ground with His finger.
My note
Source: vedabase.io