The Messenger of Allah ﷺ said, "There is no Arabian horse but that he is permitted to make two supplications at every dawn. He says, 'O Allah, You have placed me under the care of one of the children of Adam and made me his property, so make me the most beloved to him of his family and wealth,' or 'among the most beloved of his wealth and family to him.'"
أخبرنا عمرو بن علي قال أنبأنا يحيى قال حدثنا عبد الحميد بن جعفر قال حدثني يزيد بن أبي حبيب عن سويد بن قيس عن معاوية بن حديج
قال رسول الله ﷺ ما من فرس عربي إلا يؤذن له عند كل سحر بدعوتين اللهم خولتني من خولتني من بني آدم وجعلتني له فاجعلني أحب أهله وماله إليه أو من أحب ماله وأهله إليه
Sourcing, its isnad is sahih. Ahmad reported it (5/170) from Yahya bin Saeed Qattan through this route, and Hakim graded it sahih (2/92), and Dhahabi agreed with him.