Date: 20 Shevat 5591
From: Rabbi Moshe Sofer
To: Rabbi Zechariah Yeshayahu Katz
The responsum addresses a question from the Sefer Lechem Shamayim regarding the source for the law of gleanings (leket), specifically why a biblical verse is needed if it could be derived from the principle of 'safek gezel' (doubtful theft).
Source: Shu"t Chasam Sofer CM §205