The Prophet (P.B.U.H.) told one of his pious friends named Jabbir bin Abdullah, "Oh Jabbir! You will live and will see my son Mohammad Bin Ali Bin Al Hussain whose name in Torah (The Old Testament) is Baqir, convey my compliments (Salam) to him."
The Prophet (P.B.U.H.) passed away and Jabbir remained alive for long times to come. One day, he visited the house of Imam Zain-ul-Abidin (A.S.) and came across a small child. He asked lmam Sajjad (A.S.), "Whose is this child?" He replied, "He is my son Mohammad Baqir (A.S.) who is the Imam of the Muslims next to myself."
Jabbir got up and kissed the foot of Imam (A.S.) and said, "My life be sacrificed upon you, oh the son of Prophet (P.B.U.H.) accept the compliments (Salam) of your grandfather the Prophet of God (P.B.U.H.). He conveyed his compliments through me."
Imam's (A.S.) eyes were filled up with tears and he said, "compliments and benediction be upon my grandfather the Prophet of God (P.B.U.H.) until the Sky and Earth are stable (firm) and upon you too, Oh Jabbir, that you conveyed his compliment to me."
source : www.tebyan.net