His faith in the Messenger of Allah (salAllahu ‘alayhi wa ‘aalihi wa sallam) was unwavering; his heart believing every word the Beloved Messenger (salAllahu ‘alayhi wa ‘aalihi wa sallam) spoke, without a shadow of a doubt. It was due to this love for the Truth that he earned the title of as-Siddiq (the truthful).
He, may Allah be pleased with him, earned this title on the morning following the Me’raj (Prophetic Ascension to the Heavens); the unbelievers went to him, making a mockery of the Beloved Messenger’s (salAllahu ‘alayhi wa ‘aalihi wa sallam) report of his journey of Me’raj. They questioned how he could travel such a distance, and to the Heavens too, in such a short length of time.
Sayyidina Abu Bakr Siddique may Allah be pleased with him, asked one question before making his judgment: “Did the Messenger say that?” When this was confirmed, and it was clear to him that the Messenger of Allah (salAllahu ‘alayhi wa ‘aalihi wa sallam) had said those words, he vowed with heart and soul that this was indeed the truth. This is the essence of yaqeen (certainty), about which the Qur’an itself states, “So patiently persevere: for verily the promise of Allah is true: nor let those shake your firmness, who have (themselves) no certainty of faith.” [Qur’an 30:60]
Sayyida Aisha, may Allah be pleased with her, said about her father, “The idolaters came to Abu Bakr and said, ‘What do you think of your Companion? He claims that he was taken this night to Bayt al-Maqdis (Jerusalem).’ He replied, ‘Did he say that?’ They said, ‘Yes.’ He said, ‘He has definitely told the truth. I believe and affirm him in matters more remote than that: the news from heaven in the early part of the morning and in the evening.’ For that reason he was called as-Siddiq.” [Imam Suyuti’s Tarikh al-Khulafa]
The title of as-Siddiq was reportedly confirmed by Angel Jibra’il, who himself testified to Sayyidina Abu Bakr’s may Allah be pleased with him, strength in faith and loyalty:
Sayyidina Abu Hurairah may Allah be pleased with him, reports, “When the Messenger of Allah, may Allah bless him and grant him peace, returned on the night in which he was made to travel (to Jerusalem), and he was at Dhu Tuwa, he said, ‘Jibra’il, my people will not believe me,’ He (Jibra’il) said, Abu Bakr will believe you, and he is as-Siddiq.’” [Imam Suyuti’s Tarikh al-Khulafa]