The reward of fasting three days every month in the light of authentic Hadith

عن عبد الله بن عمرو بن العاص رضي الله عنهما قال: قال رسول الله صلى الله عليه وسلم: صوم ثلاثة من كل شهر صوم الدهر كله .

It is narrated from Sayyiduna Abdullah bin Amr bin Al-As, may Allah be pleased with them, that the Messenger of Allah, peace and blessings be upon him, said: “Fasting three days every month is equivalent to fasting continuously.”