Yazid bin Umayrah (may Allah have mercy on him) narrates that when the time of death drew near for Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him), we said to him: Give us some advice. He said: "Sit me up." Then he said: "Knowledge and faith are in their place; whoever seeks them will find them" - he said this three times - "and seek knowledge from four people: Uwaymir Abu al-Darda, Salman al-Farisi, Abdullah bin Mas'ud and Abdullah bin Salam (may Allah be pleased with them)."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8482