Calligraphy on a horse chestnut leaf. Turkey, Ottoman Empire, 19th century [2500×3370]

[Museum](https://artsandculture.google.com/asset/calligraphic-composition/NwFXGPa8muYupQ). The text, part of verse 64 from surah Yusuf (XII), reads: ‘But God is the best to take care [of him], and He is the Most Merciful of those who show mercy.’ The red pigment maybe gouache, minimum or led lead.