Musannaf Ibn Abi Shayba 17:1265

Abu Mu'awiyah narrated to us, from al-A'mash, from Abu Salih, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever relieves a Muslim of a distress from the distresses of the world, Allah will relieve him of a distress from the distresses of the Hereafter on the Day of Resurrection. And whoever conceals a Muslim, Allah will conceal him in the world and the Hereafter. And whoever makes it easy for one in hardship, Allah will make it easy for him in the world and the Hereafter. And Allah is in the aid of the servant as long as the servant is in the aid of his brother."