The caliph walking while the people ride

It is narrated from Sa'id bin al-Musayyib that when Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with him) dispatched the armies towards Sham (Syria), among them Yazid bin Abi Sufyan, Amr bin al-As and Shurahbil bin Hasanah, he walked on foot with them as far as Thaniyyat al-Wada'. They said: "O Successor of the Messenger of Allah, you are walking while we are riding?!"
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.

It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both); he said: I came to Sayyiduna Abu Bakr (may Allah be pleased with him) during his caliphate.

It is also narrated from Sayyiduna Jabir (may Allah be pleased with him); he said: During the caliphate of Sayyiduna Abu Bakr (may Allah be pleased with him), wealth came to us from Bahrain.

It is narrated from Abidah; he said: Uyaynah bin Hisn and al-Aqra' bin Habis came to Sayyiduna Abu Bakr (may Allah be pleased with him) and said: "O Successor of the Messenger of Allah!"

It is narrated from Sayyiduna Tariq bin Shihab (may Allah be pleased with him); he said: I saw the Messenger of Allah (peace and blessings be upon him), and I took part in military expeditions during the caliphate of Sayyiduna Abu Bakr (may Allah be pleased with him).

It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him); he said: We were with Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with him) when he suddenly began to weep. We said: "O Successor of the Messenger of Allah, what is this weeping?!"

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him); he said: All the Companions of the Prophet (peace and blessings be upon him) agreed and chose Sayyiduna Abu Bakr (may Allah be pleased with him) as their caliph. (Here begin the virtues of the Commander of the Believers, Sayyiduna Umar bin al-Khattab (may Allah be pleased with him).)