It is narrated from Sayyiduna Bara’ bin Azib (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings of Allah be upon him) said:“Keep your rows straight so that there may not be discord in your hearts.”The narrator said: And he (peace be upon him) used to say:“Indeed, Allah sends mercy and His angels pray for those in the first row,”or he said:“for those in the first rows.”