Hadith 2331
Narrated Ahmad bin Abd al-Wahid: On the authority of Abu Mushir. He said: Saeed, that is, Ibn Abd al-Aziz said: The meaning of the word sirraha is "in the beginning of it (the month)"
Hadith 3594
Narrated Abu Hurairah: The Prophet ﷺ said: Conciliation between Muslims is permissible. The narrator Ahmad added in his version: "except the conciliation which makes lawful unlawful and unlawful lawful. " Sulayman ibn Dawud added: The Messenger of Allah ﷺ said: Muslims are on (i. e. stick to) their conditions.