Can you tell me please for what reason one is allowed to leave from israel. And also about aliya, I heard that one can disobey his parent or even divorce to go to Eretz Yisrael can you send me please where it is written.
One can leave Eretz Yisrael for studying Torah, getting married, to save from the non-Jews and business. All with the condition it is temporarily. (Rambam Melachim 5, 9; for further information see Talmudic encyclopaedia 25, p.664-688) In order to honour one’s parents one is allowed to leave Israel, the Rishonim dispute whether this only temporarily or also permanently (ibid p.681) If ones parents prevent the child from living in Eretz Yisrael, he can disobey them (see ibid 26 p. 446 for sources and other opinions)