It wasnarrated from Abu Hurairah that the Prophet (ﷺ) said:
"Whoevercatches one Rak'ah of Friday, let him add another Rak'ah toit." (AR)
English reference (AR): Vol. 1, Book 5, Hadith 1121 (AR)
Arabic reference (AR): Book 5, Hadith 1175 (AR)