If I’m reading the Qurʿān and then a person approaches and greets me, do I reply to his greeting or finish the verse (first)?

Shaykh Ṣāliḥ al-Fawzān:

Finish the verse and then reply to his greeting. It has not been prescribed to greet the one who is reading the Qurʿān as this will disturb him and cut his recitation. Therefore, greet him when he has finished reading.