Construction of Masjid Qubāʾ begins

During his days at Qubāʾ after the Hijra, the Prophet ﷺ laid out a mosque for the Banū ʿAmr ibn ʿAwf and worked on it with his own hands — the first mosque founded in Islam. The Qurʾānic phrase "a mosque founded upon taqwā from the first day" (9:108) was understood by many early exegetes to refer to it.

The sources place the founding within the stay at Qubāʾ in Rabīʿ al-Awwal of the first year, and no day is recorded — a typical case of the chronicles fixing the month and moving on. This entry therefore carries month precision rather than a guessed day.

The mosque has been rebuilt many times since; the Prophet's ﷺ practice of visiting it and praying two rakʿahs there is itself transmitted in the ṣaḥīḥ collections.