It wasnarrated from 'Abdullah bin Shikhkhir that his father said:
"TheProphet (ﷺ) said: 'Whoever fasts continually, he neither fastsnor breaks his fast.'" (ID)
English reference (ID): Vol. 1, Book 7, Hadith 1705 (ID)
Arabic reference (ID): Book 7, Hadith 1775 (ID)