Abu Hurairah reported,
The Messenger of Allah ﷺ said, "Allah 
says, 'Where are those who loved one another for the sake of My majesty? Today I shall shade them in My shade, on a day when there is no shade but Mine.'"
Ahmad 8455
Sahihحدثنا يونس حدثنا فليح عن عبد الله بن عبد الرحمن عن سعيد بن يسار
عن أبي هريرة قال
قال رسول الله ﷺ إن الله عز وجل يقول أين المتحابون بجلالي اليوم أظلهم في ظلي يوم لا ظل إلا ظلي
Its isnad is sahih. In it, it says Ahmad said, "Fulayh narrated to us," which is definitely a mistake by the copyist, for Ahmad never met Fulayh and never narrated from him directly, but rather narrated from him through Yunus and Siraj and others. The narrations before and after this one both report from Yunus, from Fulayh, so "Yunus narrated to us" was dropped by the copyist. In the manuscript it should read, "Yunus narrated to us, Fulayh narrated to us," which is the correct form. Muslim narrated it from Abu Hurairah, and Suyuti noted its soundness in Jami Sagheer.