Ecclesiastes 11:4-6

4He that observeth the wind will not sow; and he that regardeth the clouds will not reap.

5As thou knowest not what is the way of the spirit, how the bones [grow] in the womb of her that is with child, even so thou knowest not the work of 1God who maketh all.

6In the morning sow thy seed, and in the evening withhold not thy hand; for thou knowest not which shall prosper, whether this or that, or whether they both shall be alike good.