May Allah reject these hands! I have seen the Messenger of Allah ﷺ on the pulpit gesturing no more than this pointing with his forefinger.
عُمَارَةُ قَبَّحَ اللَّهُ هَاتَيْنِ الْيَدَيْنِ قَالَ زَائِدَةُ قَالَ حُصَيْنٌ حَدَّثَنِي عُمَارَةُ قَالَ لَقَدْ رَأَيْتُ رَسُولَ اللَّهِ ﷺ وَهُوَ عَلَى الْمِنْبَرِ مَا يَزِيدُ عَلَى هَذِهِ يَعْنِي السَّبَّابَةَ الَّتِي تَلِي الإِبْهَامَ