ENOfficial
Sahl b. Sa‘d told of the Prophet (ﷺ) being accustomed to place his two fingers opposite his shoulders and make supplication.
Source: sunnah.com
Other translations
Arabic
وَعَن سهل بن سَعْدٍ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: كَانَ يَجْعَل أصبعيه حذاء مَنْكِبَيْه وَيَدْعُو
sunnah.com