Abu Hurayrah narrates that he heard the Prophet ﷺ say “When I was sleeping I saw a dream that I was at the edge of a well and there was a bucket, and I kept on pulling from the bucket as long as Allah wanted. Then Ibn Abi Quhafah (Abu Bakr) took it and he pulled it one or two times, and there was some weakness in his pulling, and Allah will forgive him for that weakness.”
This is a prediction from the Prophet ﷺ that means for a year or two Abu Bakr would continue from the his legacy and the weakness turned out to be the civil war and the wars of apostasy Abu Bakr faced which nearly tore the Ummah apart.
The narration continues from the Prophet ﷺ “Then it became a massive container and Umar ibn al-Khattab took that huge bucket, and I never saw such an amazing person do the pulling like the pulling of Umar, and he kept on pulling until even the camel’s pens drank.”
This is the prediction of the conquests of Umar which expanded the Muslim Ummah.
Source: Sahih Bukhari, narrated by Yasir Qadhi, Lives of Sahaba, Abu Bakr, Part 3