لَا بَأْسَ بِهِ .
Translation
From him, from Ahmad Bin Muhammad Bin Abu Nasr, (It has been narrated) from Abu Al-Hassan Al-Reza<sup>asws</sup> that he<sup>asws</sup> would (sprinkle) dust upon the letter (to dry the ink), and said: ‘There is no problem with it’.
Book (Kitab)كِتَابُ الْعِشْرَةِ
Chapter (Bab)بَابٌ
CollectionAl-Kafi
Compiled by Shaykh Muhammad ibn Ya'qub al-Kulayni
Source
Read on Thaqalayn Project ↗Open License
License: Free for educational and research use (Thaqalayn Data API)
Provided for research and educational purposes. Original source: Thaqalayn Project. Open License.