Responsa su Esodo 13:7

They responded: the commandments around chametz were the first given to the children of Israel; they were accepted with love and warmth and joy, and they were guarded strictly down to the most minute details. You can see that the Torah was stringent to the level of prohibiting even seeing and owning it²Exodus 12:19 and Exodus 13:7 .. This is not the case for any other prohibition except for idolatry, where it is written "Do not bring an abhorrent thing into your house" (Deuteronomy 7:26). All who increase their meticulous observance shall have the days and years of their life increased too.