The Prophet ﷺ said, "A believer to another believer is like a building whose different parts enforce each other." The Prophet ﷺ then clasped his hands with the fingers interlaced (while saying that).
عَنِ النَّبِيِّ ﷺ قَالَ الْمُؤْمِنُ لِلْمُؤْمِنِ كَالْبُنْيَانِ يَشُدُّ بَعْضُهُ بَعْضًا وَشَبَّكَ بَيْنَ أَصَابِعِهِ