Answered by Shaykh Faraz Rabbani
If one intentionally misses (not out of hatred or contempt of God’s injunctions but out of laziness) Salat for a period of 10 days or so and then regains his motivation to pray regularly and does so for a short period and then again loses his motivation to miss out on Salat once again and this process repeatedly occurs, does he commit apostasy? (Note: He intends to retire one day from what he is doing presently and devote himself completely to following the commandments of Allah)
Answer:
Walaikum assalam wa rahmatullah,
The position of the overwhelming majority of scholars is that intentionally leaving prayers, though a major sin, is not unbelief unless accompanied by denial of the obligation of praying. [Mawsu`a Fiqhiyya; Radd al-Muhtar; Majmu`]
Wassalam,
Faraz Rabbani