Imam Sadiq (A.S.) said:
After the news of the martyrdom of Ja'far Ibn Abi Talib (A.S.) and Zaid Ibn Harithah reached the Holy Prophet (S.A.W.), whenever he entered his house, he would weep profusely for them and say: " They used to converse with me and were intimate with me and (now) both of them have departed together".
Man La Yahdhuruhu al‑Faqih, vol. 1, pg. 177