1. "Dear sister, as you enter this engagement, may your love story be like a beautiful fairytale, filled with magic and joy."
2. "Sister, your engagement is the start of a new and exciting chapter. Wishing you a lifetime of love and laughter with your partner."
3. "To my dearest sister on your engagement, may your bond be as strong as the roots of an ancient tree, growing deeper with each passing day."
4. "Sister, this engagement is a promise of a beautiful future. May you always find comfort, support, and love in your partner's arms."
5. "Dear sister, congratulations on your engagement! May your journey together be filled with endless love, like a river that never runs dry."
6. "On your engagement, sister, I wish you a love that shines brightly, like a diamond, through all the days of your life."
7. "Sister, your engagement is like a beautiful melody starting. May your relationship be harmonious and filled with sweet notes of love."
8. "Dear sister, as you get engaged, may your love be the kind that weathers every storm and blossoms in the sunshine of life."
9. "Sister, this engagement is a new adventure. May you and your partner have a love that's an exciting and beautiful exploration."
10. "To my wonderful sister on your engagement, may your hearts be always intertwined, like two vines growing together."
11. "Sister, congratulations on your engagement! May your love be a guiding light, leading you through a life full of beautiful moments."
12. "On your engagement, dear sister, may you have a love that's as warm as a cozy fireplace on a cold winter night."
13. "Sister, your engagement marks the beginning of a love story that I hope will be filled with passion, understanding, and unwavering devotion."
14. "Dear sister, as you start this engagement journey, may your love be like a beautiful flower bed, blooming with colors of happiness."
15. "Sister, congratulations! Your engagement is a step towards a future filled with love, and may your days be filled with beautiful memories in the making."
16. "On your engagement, sister, may your relationship be like a well - built bridge, strong enough to cross any obstacle life throws at you."
17. "Sister, this engagement is a celebration of your love. May it grow and flourish, like a garden in full bloom."
18. "Dear sister, as you enter this new phase of engagement, may your love be like a lighthouse, always guiding you both home to each other."
19. "Sister, congratulations on your engagement. May your love be a constant source of strength, like a mountain that stands firm."
20. "On your engagement, dear sister, may your love story be written with the most beautiful words of kindness, respect, and eternal love."