Riyad us Saliheen: Hadith 1029

Abu Hurairah (May Allah be pleased with him) reported that the Messenger of Allah (ﷺ) said, "Shall I not tell you something by which Allah effaces the sins and elevates ranks (in Jannah)?" The Companions said; "Certainly, O Messenger of Allah." He (ﷺ) said, "Performing the Wudu' thoroughly in spite of difficult circumstances, walking with more paces to the mosque, and waiting for the next As- Salat (the prayer) after observing Salat; and that is Ar-Ribat, and that is Ar-Ribat."

[Muslim].