"On the day of the Conquest of Makkah, the Messenger of Allah . He ('Uthman) said: 'O Messenger of Allah! Accept the allegiance of 'Abdullah.' He raised his head and looked at him three times, refusing his allegiance each time, then he accepted his allegiance after three times. Then he turned to his Companions and said: 'Was there not any sensible man among you who would get up when he saw me refusing to give him my hand and kill him?' They said: 'We did not know, O Messenger of Allah, what was in your heart. Why did you not gesture to us with your eyes?' He said: 'It is not befitting for a Prophet that his eyes be deceitful.'"
Sunan an-Nasa'i Book 37, Hadith 102
← Previous Hadith "That the Prophet to you.' Abu Musa gave him a cushion to sit down, then a man was brought who had been a Jew, then he became a Muslim, then he reverted to Kufr. Mu'adh said: 'I will not sit down until he is killed; this is the decree of Allah and His Messenger,' (saying it) three times. When he was killed, he sat down."

Sunan an-Nasa'i Book 37, Hadith 101 Next Hadith → "A man from among the Ansar accepted Islam, then he apostatized and went back to Shirk. Then he regretted that, and sent word to his people (saying): 'Ask the Messenger of Allah and said: 'So and so regrets (what he did), and he has told us to ask you if there is any repentance for him?' Then the Verses: 'How shall Allah guide a people who disbelieved after their Belief up to His saying: Verily, Allah is Oft-Forgiving, Most Merciful' was revealed. So he sent word to him, and he accepted Islam."

Sunan an-Nasa'i Book 37, Hadith 103