Yusuf is Rescued from the Well and sold as a Slave

Allah narrates what happened to Yusuf, peace be upon him, after his brothers threw him down the well and left him in it, alone, where he remained for three days, according to Abu Bakr bin `Ayyash. Muhammad bin Ishaq said, "After Yusuf's brothers threw him down the well, they remained around the well for the rest of the day to see what he might do and what would happen to him. Allah sent a caravan of travelers that camped near that well, and they sent to it the man responsible for drawing water for them. When he approached the well, he lowered his bucket down into it, Yusuf held on to it and the man rescued him and felt happy,

يبُشْرَى هَـذَا غُلاَمٌ

There is No Chance or Accident in Divine Arrangements

It is said in verse 19: وَجَاءَتْ سَيَّارَ‌ةٌ فَأَرْ‌سَلُوا وَارِ‌دَهُمْ فَأَدْلَىٰ دَلْوَهُ (And there came some wayfarers and sent one of them to go for water. So, he let down his bucket). The word: سَيَّارَ‌ةٌ (sayyara) means wayfarers or a caravan. Wrid (وارِد) is a person who moves ahead of the caravan as its vanguard. Such a person is responsible for taking care of the needs of the caravan, water being one of them. Idla أَدْلَىٰ ) means to lower the bucket into the well to draw water. The sense is that a caravan passed by this part of land by chance. According to Tafsir al-Qurtubi, this caravan was coming from Syria on its way to Egypt. Having lost its bearing, it strayed into this desolate place and sent some of his men to bring water from the well.