Hadith 749
رش قبر النبى صلى الله عليه وسلم وكان الذى رش الماء على قبره بلال بن رباح ، بدأ من قبل رأسه حتى انتهى إلى رجليه
“Water was sprinkled on the grave of the Noble Prophet (peace and blessings of Allah be upon him). Bilal (may Allah be pleased with him) sprinkled water from a waterskin on the grave of the Prophet (peace and blessings of Allah be upon him). He began sprinkling from the head side and continued sprinkling water up to the foot side.”
Hadith 750
أن رسول الله صلى الله عليه وسلم رش على قبر ابنه إبراهيم الماء ووضع عليه الحصباء
"The Messenger of Allah (peace and blessings be upon him) sprinkled water on the grave of his son Ibrahim and placed pebbles on it."