Hadith : Whoever fills the gape (in the row of prayer) Allah will build a house for him in the paradise

Bismilahirrahmanirrahim

✦ Rasool Allah Sallallahu Alaihi Wasallam said
Whoever fills the gape (in the row of prayer) Allah will build a house for him in the paradise and will raise him a  level

Al-Silsila-tus-Sahiha 737 , 

Saheeh At-Targheeb,336-Sahih