The Messenger of Allah ﷺ set out in Rabiʿ al-Awwal of Year 2 after the Hijrah (2 AH) on the First Badr Expedition until he reached Wadi Safawan
The Messenger of Allah ﷺ went on the First Badr Expedition in Rabiʿ al-Awwal of Year 2 after the Hijrah (2 AH), until he reached Wadi Safawan.

The Messenger of Allah ﷺ went on the First Badr Expedition in Rabiʿ al-Awwal of Year 2 after the Hijrah (2 AH), until he reached Wadi Safawan.
It falls within the events of Year 2 after the Hijrah (2 AH), in the context of the early expeditions after settling in Madinah.
And in Rabiʿ al-Awwal, also in this year: the Messenger of Allah ﷺ went on the First Badr Expedition until he reached Wadi Safawan.
This means that the Prophet ﷺ set out on a campaign or ghazwah at this time and reached Wadi Safawan, the place mentioned.
One of the events of Year 2 after the Hijrah (2 AH)
Leader of the ghazwah