Hadith 1:

Narrated as part of lengthy narration from Imam Ali Ridha (عليه السلام), that the Prophet (صلى الله عليه وآله) said,

فَبِنَا اهْتَدَوْا إِلَى مَعْرِفَةِ تَوْحِيدِ اللَّهِ تَعَالَى وَ تَسْبِيحِهِ وَ تَهْلِيلِهِ وَ تَحْمِيدِهِ

"Through us, the angels were guided to the knowledge/recognition of the oneness (Tawheed) of Allah, and His glorification (Tasbeeh), His Tahleel (saying La ilaha illa-llah), and His Praise (Tahmeed)."

[Source: Kamal al-Deen, Shaikh Sadooq, Vol. 1, Ch. 23, Hadith. 4]