TIRMIDHI 687:
from Abū Hurayrah —
the Messenger of Allah said: "Count the (the appearances of) the crescent of Sha'ban for Ramadan."
الترمذي ٦٨٧:
عن ابو هريره —
قَالَ رَسُولُ اللَّهِ ﷺ أَحْصُوا هِلاَلَ شَعْبَانَ لِرَمَضَانَ