Sayyiduna Anas bin Malik (may Allah be pleased with him) said: We travelled with the Messenger of Allah (peace and blessings be upon him) in Ramadan, and no fasting person found fault with one who was not fasting, nor did one who was not fasting find fault with a fasting person.
In a narration of Abu al-Husayn: Some of us were fasting and some were not fasting, but the fasting one did not find fault with the one not fasting, nor the one not fasting with the fasting one.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8161