Silsilah as-Sahihah 578 — Virtue of stepping forward to fill a gap

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) said: "The best among you are those who are gentle with their shoulders in prayer (when standing together in rows). No step is more rewarding than the one taken to fill a gap in the row."