Imam Muhammad Baqir (a.s.) informed: Knowledge of the Book of Allah and the Sunnah of His Messenger develops in the heart of our Mahdi, just as a plant grows to perfection. Thus whosoever of
you survives till he sees him, when you meet him you must greet him by the words: “Peace be on you, O resident of the house of mercy and prophethood and the mine of knowledge and the abode of messengership.
Kamaal al-Deen v 2 p 653