:salam2:
This is what I had read in sealed nectar for for the 1 question.
Ibn Ishaq related that: “When the Messenger of Allâh (Peace be upon him) was going up the hillock, he was followed by Ubai bin Khalaf who was saying: ‘Where is Muhammad (Peace be upon him)? Either I kill him or I will be killed.’ The Companions of Muhammad (Peace be upon him) said: ‘O Messenger of Allâh, do you mind if one of us combats with him?’ But the Messenger of Allâh (Peace be upon him) said: ‘Leave him!’ So when he drew nearer, the Messenger of Allâh (Peace be upon him) took the spear from Al-Harith bin As-Simma. He shivered violently in such a way that made all of them scatter in all directions violently and impulsively. Then he faced him, observed his clavicle through a gap between the wide opening of the armour and the part of his neck enclosed by. He speared him in that spot. The effect of the stroke was so strong that it made him roll off his horse over and over. When he returned to Quraish, they found that he had only had a small scratch in his neck. So when blood became congested he said: ‘By Allâh, Muhammad has killed me.’ Hearing him say so, they said: ‘By Allâh you are afraid to death. By Allâh, you are possessed by a devil.’ He replied: ‘He had already told me when we were in Makkah: ‘I will kill you.’ By Allâh, had he spate on me, he would have killed me.’ Eventually, the enemy of Allâh breathed his last at a place called Sarif, while they were taking him back to Makkah.” In a version by Abul-Aswad, on the authority of ‘Urwa: He was lowinglike a bull and saying: “By the One in Whose Hand is my soul, if (the pain) I am suffering from now were distributed among the people of Al-Majaz, it would cause them to die.”
And
Ibn al-Qayyim said – when discussing the battle of Uhud –  
The Prophet (peace and blessings of Allaah be upon him) turned towards the Muslims, and the first one who recognized him beneath his armour was Ka’b ibn Maalik, who shouted at the top of his voice, “O Muslims! Rejoice! This is the Messenger of Allaah (peace and blessings of Allaah be upon him)!” He gestured to him to be quiet, and the Muslims gathered around him and went with him to the mountain pass where he had camped. Among them were Abu Bakr, ‘Umar, ‘Ali, al-Haarith ibn al-Simmah al-Ansaari and others. When they got close to the mountain, Ubayy ibn Khalaf, who was on a horse of his whose name was al-‘Iwadh, caught up with the Messenger of Allaah (peace and blessings of Allaah be upon him).  The enemy of Allaah had claimed that he would kill the Messenger of Allaah (peace and blessings of Allaah be upon him) whilst riding this horse. When he got close to him, the Messenger of Allaah (peace and blessings of Allaah be upon him) took a spear from al-Haarith ibn al-Simmah and killed him with it. It hit him in his collarbone and the enemy of Allaah retreated in defeat. The mushrikeen said to him, By Allaah, there is nothing wrong with you. He said, By Allaah, if what is wrong with me had happened to the family of Dhu’l-Majaaz, they would all have died. He used to feed his horse in Makkah and say, I will kill Muhammad riding it. News of that reached the Messenger of Allaah (peace and blessings of Allaah be upon him) and he said: “Rather I will kill him in sha Allaah.” When he stabbed him, the enemy of Allaah remembered that that the Prophet (peace and blessings of Allaah be upon him) had said, “Rather I will kill him,” and he was certain that he would die from this wound. And he died from it in Sarif on his way back to Makkah. 
Zaad al-Ma’aad, 3/199