Musnad Ahmad 306:1

Rawh narrated to us, he said: Hammad ibn Salamah narrated to us, from Thabit, who said: Ibn Umar ibn Abi Salamah narrated to me, from his father, from Umm Salamah, that Abu Salamah narrated to them that the Messenger of Allah (may Allah bless him and grant him peace) said: "If a calamity befalls any one of you, let him say: 'To Allah we belong and to Him we shall return. O Allah, with You I seek the reward for my calamity, so reward me for it, and replace it for me with something better than it.'" When Abu Salamah passed away, Allah the Almighty and Majestic replaced him for me in my family with someone better than him.