Asim bin Humayd al-Sakuni (may Allah have mercy on him) narrates from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings be upon him) sent him to Yemen, he went out with him, giving him advice. Mu'adh (may Allah be pleased with him) was riding, and the Messenger of Allah (peace and blessings be upon him) was walking beside his mount. When he had finished, he said: "O Mu'adh! It may be that you will not meet me after this year of mine, and perhaps you will pass by my mosque and my grave." So Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) wept in grief at parting from the Messenger of Allah (peace and blessings be upon him), and the Prophet (peace and blessings be upon him) said to him: "Do not weep, O Mu'adh, for weeping is from Satan."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17378