Chekhawa Yeshe Dorje (1102–1176) composed Training the Mind in Seven Points. He calls it “instructions for controlling self-grasping”. This is one of the essential root texts of the Kadampa tradition and was the basis for Je Tsongkhapa’s text Sunrays of Training the Mind, which is regarded as one of the most authoritative commentaries on training the mind.
https://en.wikipedia.org/wiki/Chekawa_Yeshe_Dorje https://walthambuddhist.org/pdf/lojong_root_text.pdf
commentaries on 7-point mind training
https://www.amazon.nl/Mind-Training-Ringu-Tulku/dp/1559392789
https://www.amazon.nl/Training-Cultivating-Loving-Kindness-Chogyam-Trungpa/dp/1590300513/
https://studybuddhism.com/en/tibetan-buddhism/mind-training