Abu Hurayrah also transmitted the Prophet's ﷺ words about sighting the moon. A short excerpt reads:
فَإِنْ غُبِّيَ عَلَيْكُمْ فَأَكْمِلُوا عِدَّةَ شَعْبَانَ ثَلاَثِينَ (Sahih al-Bukhari: 1909)
Meaning: If the moon is obscured, complete thirty days of Shaʿbān1.
Ibn ʿUmar's report also spoke of completing thirty days. Here, the meaning agrees, but the Companion is different: Abu Hurayrah.
1. Shaʿbān (شعبان): the Islamic month immediately before Ramadan.