Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "Whoever leaves one fast of Ramadan without an excuse for which Allah Almighty has granted him a concession, he cannot make it up even if he fasts the whole year."
Imam al-Tirmidhi (may Allah have mercy on him) said: I asked Imam al-Bukhari (may Allah have mercy on him) about this, and he said: Abu al-Mutawwis's name is Yazid bin al-Mutawwis; he is alone in narrating this hadith, and I do not know whether his father heard from Sayyiduna Abu Hurayrah (may Allah be pleased with him) or not.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8065
Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: Whoever leaves one fast of Ramadan without an excuse, the fasts of his whole life will not benefit him, until he meets Allah Almighty; if He wills He will forgive him, and if He wills He will punish him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8066
Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: Whoever deliberately leaves one fast in Ramadan without any excuse, and then keeps making it up for a long time, it will not be accepted from him.
I think this Abd al-Malik is Ibn Husayn al-Nakha'i; he is not strong.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8067
Ibrahim (al-Nakha'i) and Sa'id bin Jubayr (may Allah have mercy on them) said about a man who deliberately broke one day's fast in Ramadan: We do not know what his expiation is; he should fast one day in its place, and repent and seek forgiveness.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8068
Isma'il bin Salim narrates from Mujahid (may Allah have mercy on him) that the Prophet (peace and blessings be upon him) ordered the man who had left one day's fast in Ramadan that "his expiation is the expiation of zihar."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8069
Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates a similar hadith from the Prophet (peace and blessings be upon him) in abridged form.
Jarir narrated this hadith from Sayyiduna Abu Hurayrah (may Allah be pleased with him), and in it the incident of the man who had intercourse with his wife in Ramadan is explained in detail; and through another chain too this same story is clearly stated. So nothing is established from him (peace and blessings be upon him) regarding breaking the fast by eating.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8070