O son of al-Akwa', you have turned apostate and have come to live again in the desert with the Bedouins (after your migration). He said: No, but the Messenger of Allah (ﷺ) has permitted me to live in the desert.
Sahih Muslim Book 33, Hadith 121
← Previous Hadith A person came to him and said: Here is Ibn Hanzala who is making people swear allegiance to him. He (, Abdullah) asked: To what effect? He replied: To the effect that they will die for him. 'Abdullah said: I will never swear allegiance to this effect after the Messenger of Allah (ﷺ).

Sahih Muslim Book 33, Hadith 120 Next Hadith → I came to the Prophet (ﷺ) to offer him my pledge of migration. He said: The period of migration has expired (and those who wereto get the reward for this great act of devotion have got it). You may now give your pledge to serve the cause of Islam, to strive in the way of Allah and to follow the path of virtue.

Sahih Muslim Book 33, Hadith 122