وَعَنْ وَاثِلَةَ بْنِ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ قَالَ: دَخَلَ رَجُلٌ إِلَى رَسُولِ اللَّهِ ﷺ وَهُوَ فِي الْمَسْجِدِ قَاعِدٌ، فَتَزَحْزَحَ لَهُ رَسُولُ اللَّهِ ﷺ، فَقَالَ الرَّجُلُ: يَا رَسُولَ اللَّهِ! إِنَّ فِي الْمَكَانِ سَعَةً، فَقَالَ النَّبِيُّ ﷺ: «إِنَّ لِلْمُسْلِمِ لَحَقًّا إِذَا رَآهُ أَخُوهُ أَنْ يَتَزَحْزَحَ لَهُ».
Translation: A man approached the Messenger of Allah ﷺ while he was seated in the mosque. The Prophet ﷺ moved slightly to make room. The man remarked that there was plenty of space. The Prophet ﷺ replied that a Muslim has a right that his brother should shift to make room when he sees him.
فَتَزَحْزَحَ means “he shifted aside,” and إِنَّ فِي الْمَكَانِ سَعَةً means “there is ample room in the place.” The gesture honored the visitor rather than merely solving a shortage of seating.
Source: al-Bayhaqi, Shuʿab al-Iman