Anas bin Malik reported,

I never saw the Messenger of Allah ﷺ pray the Maghrib prayer until he had broken his fast, even if only with a sip of water.

Azami 4385

Sahih

عن أنس، قال

ما رأيت رسول الله ﷺ قط صلى صلاة المغرب حتى يفطر، ولو على شربة من ماء.

الأعظمي 4385صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Fasting
Chapter
Obligation of fasting, its virtue, and its rulings
Section
Recommendation to break the fast before performing Maghrib prayer
Numbering
Jami al-Kamil 4385 (2nd edition)
Azami 4385