Sahih Muslim, 2724

Ibn Abbas (Allah be pleased with both of them) reported:The Messenger of Allah (ﷺ) did not fast throughout any month except during ramadan. And when he observed fast (he fasted so continuously) that one would say that he would not break (them) and when he Abandoned, he abandoned (so continuously) that one would say: By Allah, perhaps he would never fast

Rapporté par Ibn Abbas رضي الله عنهما : Le Messager d’Allah ﷺ n’a jamais jeûné un mois entier sauf pendant le Ramadan. Et quand il jeûnait, il le faisait de façon si continue qu’on pensait qu’il n’allait jamais arrêter, et quand il arrêtait, il le faisait si longtemps qu’on disait : « Par Allah, il ne jeûnera peut-être plus jamais. »