Sahih al-Bukhari — Companions of the Prophet — Hadith No: 3770

Narrated Asma:I prepared the journey food for the Prophet (ﷺ) and Abu Bakr when they wanted (to migrate to) Medina. I said to my father (Abu Bakr), "I do not have anything to tie the container of the journey food with except my waist belt." He said, "Divide it lengthwise into two." I did so, and for this reason I was named 'Dhat-un-Nitaqain' (i.e. the owner of two belts). (Ibn `Abbas said, "Asma', Dhat-un-Nitaq)

Narrated Sa`d bin Malik:In the year of Hajjat-ul-Wada` the Prophet (ﷺ) visited me when I fell ill and was about to die because of that illness. I said, "O Allah's Messenger (ﷺ)! I am very ill as you see, and I am a rich man and have no heir except my only daughter. Shall I give 2/3 of my property in charity?" He said, "No." I said, "Shall I then give one half of it in charity?" He said, "O Sa`d! Give 1/3 (in charity) and even 1/3 is too much. No doubt, it is better to leave your children rich than to leave them poor, reduced to begging from others. And Allah will reward you for whatever you spend with the intention of gaining Allah's Pleasure even if it were a mouthful of food you put into your wives mouth." I said, "O Allah's Apostle! Am I to be left behind (in Mecca) after my companions have gone?" He said, "If you should be left behind, you will be upgraded and elevated for every deed you will do with a desire to achieve Allah's Pleasure. I hope that you will live long so that some people will benefit by you while others will be harmed. O Allah! Please fulfill the migration of my companions and do not make them turn back on their heels. But (we feel sorry for) the unlucky Sa`d bin Khaulah." Allah's Messenger (ﷺ) lamented his death in Mecca

Narrated Salman Al-Farisi:That he was sold (as a slave) by one master to another for more than ten times (i.e. between 13 and)

Narrated Al-Bara:The companions of (the Prophet) Muhammad who took part in Badr, told me that their number was that of Saul's (i.e. Talut's) companions who crossed the river (of Jordan) with him and they were over three-hundred-and-ten men. By Allah, none crossed the river with him but a believer. (See Qur'an 2:)