Excellence of sending prayers upon the Prophet (ﷺ)

وَقَالَ صلى الله عليه وسلم: (الْبَخِيلُ مَنْ ذُكِرْتُ عِنْدَهُ فَلَمْ يُصَلِّ عَلَيَّ)

The Prophet (ﷺ) said: "The miser is the one in whose presence I am mentioned yet does not pray for Allah's blessings upon me."

At-Tirmidhi 5/551 and others. See also Al-Albani, Sahih At-Tirmidhi 3/177 and Sahihul-Jarai' As-Saghir 3/25.