Abu Bakr As-Siddeeq, may Allah be pleased with him:
His name is ‘Abdullaah ibn Abi Quhaafah, may Allah be pleased with him, and the name of Abu Quhaafah (i.e., his father) is ‘Uthmaan ibn Ka’b At-Taymi Al-Qurashi. His mother is Salma bint Sakhr ibn ‘Aamir At-Taymi.
Abu Bakr, may Allah be pleased with him, was among those who accompanied the Prophet from the beginning of his Da’wah (call) to Islam, and is considered to be his nearest friend. He was the first Rightly-Guided Caliph, and one of the ten Companions who were given the glad tidings of entering Paradise. He supported the Prophet and he was the first to accept Islam at his hands.
Abu Bakr, may Allah be pleased with him, was the one who guarded the Prophet in his bower on the day of Badr. After the death of the Prophet he was recognized as his Caliph (successor), and this happened exactly on Tuesday, the second of Rabee’ Al-Awwal, in the year 11 A.H. His caliphate lasted for about two years and four months, and he died on Monday, the 22nd of Jumaadah Al-Oola, in 13 A.H.
Sa’d bin Abi Waqqaas, may Allah be pleased with him:
The name of his father is Maalik ibn Uhayb ibn ‘Abd Manaaf ibn Zuhrah Az-Zuhri Al-Madani. He witnessed Badr and all the battles, was one of the ten Companions who were given the glad tidings of Paradise, and was the last one of them to die. He was the first to shoot an arrow in the cause of Allah, and he was the cavalier of Islam. He was also among the six councilors appointed by ‘Umar, may Allah be pleased with him. He was the leader of the army of Islam in the conquest of Iraq. Moreover, the Prophet praised him by saying: "Shoot, may my father and mother be sacrificed for you! [this is a phrase used by the Arabs to express love and esteem].” [Al-Bukhari]
Sa’d, may Allah be pleased with him, was among the guards of the Prophet . ‘Aa'ishah, may Allah be pleased with her, reported that, “the Prophet got no sleep at one night and he said: "If only a righteous man from my Companions [would] come to guard me.” Then we heard the sound of [a] weapon; thereupon the Prophet called: "Who is this?" and the man outside replied, "I am Sa’d ibn Abi Waqqaas, O Messenger of Allah. I came to guard you." ‘Aa'ishah, may Allah be pleased with her, said, "The Prophet then slept till I heard him snore." [Muslim]
Az-Zubayr ibn Al-‘Awwaam ibn Khuwaylid ibn Asad, may Allah be pleased with him:
His nickname is Abu ‘Abdullaah. He was fifteen years old when he embraced Islam, and was among the seven forerunners to Islam. His mother is Safiyyah bint ‘Abdul-Muttalib ibn ‘Abd Manaaf, the aunt of the Prophet . He was among those who emigrated to Al-Habashah (Abyssinia), and he also emigrated to Madeenah. He married Asmaa' bint Abi Bakr, may Allah be pleased with her.
He, may Allah be pleased with him, witnessed Badr and all the battles with the Prophet . He guarded the Prophet on the day of Al-Khandaq (the day of the Battle of the Trench). Furthermore, he was among those sent by ‘Umar ibn Al-Khattaab, may Allah be pleased with him, as reinforcement to ‘Amr ibn Al-‘Aas, may Allah be pleased with him, in the conquest of Egypt. When ‘Umar, may Allah be pleased with him, died, Az-Zubayr, may Allah be pleased with him, was among the six Companions who were appointed by him to choose the caliph from amongst them.
He, may Allah be pleased with him, was treacherously assassinated at the hands of a man called ‘Amr ibn Jurthoom in the Battle of the Camel, and he was buried in the outskirts of the city of Al-Basrah.
Sa’d ibn Mu‘aath, may Allah be pleased with him:
He is Sa’d ibn Mu‘aath ibn An-Nu’maan ibn Imru' Al-Qays Al-Ansaari Al-Awsi Al-Ash-hali, and his mother is Kabshah bint Raafi’. He was one of the Companions and came from the people of Madeenah. He was the head of the tribe of Al-Aws, and his nickname was Abu ‘Umar. He embraced Islam at the hands of Mus‘ab ibn ‘Umayr, may Allah be pleased with him, whom the Prophet sent to Madeenah before the Hijrah (Emigration) to call its people to Islam. He witnessed Badr, and on that day he guarded the Prophet in his bower. He also carried the flag of the tribe of Al-Aws in Badr and showed extreme courage. He witnessed Al-Khandaq, in which he was injured, and when he died he was thirty-seven years old.