there. He met a friend of his named Ad-Dughna (chief of the Qarah tribe) outside Mecca, who invited Abu Bakr to seek his protection against the Quraysh. Abu Bakr went back to Mecca, it was a relief for him, but soon due to the pressure of Quraysh, Ad-Dughna was forced to renounce his protection. Once again the Quraysh were free to persecute Abu Bakr. In 620, Muhammad's uncle and protector, Abu Talib ibn Abd al-Muttalib, and Muhammad's wife Khadija died. Abu Bakr's daughter Aisha was betrothed to Muhammad; however, it was decided that the actual marriage ceremony would be held later. In 620 Abu Bakr was the first person to testify to Muhammad's Isra and Mi'raj (Night Journey). Migration to Medina In 622, on the invitation of the Muslims of Medina, Muhammad ordered Muslims to migrate to Medina. The migration began in batches. Ali was the last to remain in Mecca, entrusted with responsibility for settling any loans the Muslims had taken out, and famously slept in the bed of Muhammad when the Quraysh, led by Ikrima, attempted to murder Muhammad as he slept. Meanwhile, Abu Bakr accompanied Muhammad to Medina. Due to the danger posed by the Quraysh, they did not take the road, but moved in the opposite direction, taking refuge in a cave in Jabal Thawr, some five miles south of Mecca. Abd Allah ibn Abi Bakr, the son of Abu Bakr, would listen to the plans and discussions of the Quraysh, and at night he would carry the news to the fugitives in the cave. Asma bint Abi Bakr, the daughter of Abu Bakr, brought them meals every day. Aamir, a servant of Abu Bakr, would bring a flock of goats to the mouth of the cave every night, where they were milked. The Quraysh sent search parties in all directions. One party came close to the entrance to the cave, but was unable to see them. Due to this, Quranic verse was revealed. Aisha, Abu Saʽid al-Khudri and Abd Allah ibn Abbas in interpreting this verse said that Abu Bakr was the companion who stayed with Muhammad in the cave. After staying at the cave for three days and three nights, Abu Bakr and Muhammad proceed to Medina, staying for some time at Quba, a suburb of Medina. Life in Medina In Medina, Muhammad decided to construct a mosque. A piece of land was chosen