The Congregation Appointing Someone To Lead Them If The Imam Is Delayed And If There Is No Fear Of Negative Repercussions Sahih Muslim 421 b
Translation
This hadith is transmitted by Sahl b. Sa'd in the same way as narrated by Malik, with the exception of these words
" Abu Bakr lifted his hands and praised Allah and retraced his (steps) till he stood in a row."