The proverb 'Many a little makes a mickle' means-

₻ Many a little makes a mickle - দশের লাঠি একের বোঝা।
in this phrase, a little is a small amount of something and a muckle is a large amount, so the saying means that you can accumulate a great deal by many small savings.

Other options:
• Many drops make a shower- বিন্দু বিন্দু জলে সিন্ধু হয়।
• Make hay while the sun shines- ঝোপ বুঝে কোপ মারো।
• Man proposes God disposes- মানুষ চায় এক, হয় আর এক।

Source: Website Lecture.