Muhammad bin Ajlan al-Madni محمد بن عجلان المدني · The Book on Salat (Prayer)

"The Prophet ordered placing the hands (on the ground) keeping the feet erect. (by resting feet on the toes and making the tips of the toes facing the Qiblah)."

"The Prophet ordered placing the hands (on the ground)." And he mentioned in it: "From his father."

" about the hardship of the prostration on them, when they were so spread out, so he said: 'Use your knees.'"

Allah's Messenger prohibited the recitation of poetry in the Masjid, and from selling and buying in it, and (he prohibited) the people from forming circles in it on Friday before the Salat."

Allah's Messenger (S) said: "When one of you performs Wudu and does so well, then he leaves intending to go to the Masjid, then let him not intertwine his fingers, for indeed he is in Salat."