Sayyiduna Amr bin al-Hamiq al-Khuza'i (may Allah be pleased with him) narrates that he gave the Prophet (peace and blessings be upon him) water to drink, and he supplicated for him:
"O Allah! Preserve his youth." He reached the age of 80, yet not a single hair of his had turned white.
Al-Tabarani recorded it; its chain contains a narrator, Ishaq bin Abdullah bin Abi Farwah, who is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 16129