Abu Musa (May Allah bepleased with him) reported:
Messenger of Allah ﷺ said, "The relationship of the believer with another believer is like (the bricks of) a building, each strengthens the other." He ﷺ illustrated this by interlacing the fingers of both his hands.

[Al-Bukhari and Muslim].

وعن أبي موسى رضي الله عنه قال: قال رسول الله ﷺ
" المؤمن للمؤمن كالبنيان يشد بعضه بعضًا" وشبك بين أصابعه . ((متفق عليه)) .