'A'isha reported:
Never could the family of Muhammad (ﷺ) (afford to eat) the bread of wheat for two days successively. Even (out of these two days) one (was such wherein he could get) only a date.
Reference: Sahih Muslim 2971
In-book reference: Book 55, Hadith 32
USC-MSA web (English) reference(deprecated numbering scheme): Book 42, Hadith 7088