Learn Arabic (Modern Standard): من زرع حصد.

When مَن starts a sentence and is followed by two verbs that show a cause-and-effect relationship, it acts as a conditional word meaning "whoever" or "the one who". If it were a question, it would usually only have one main action, such as simply asking "Who planted?"

Why are the verbs زرع and حصد in the past tense if the English translation uses the present tense "sows" and "reaps"?

In Arabic, conditional sentences and proverbs frequently use the past tense to express general, timeless truths. Even though we translate it using the English present tense, the Arabic past tense emphasizes that the result is absolutely certain: if the planting has happened, the harvesting is guaranteed.

Is the first word pronounced "min" or "man"?

It is pronounced "man" (مَن), meaning "who" or "whoever". Because Arabic is usually written without short vowels, learners often mix this up with the preposition "min" (مِن), which means "from". The context of a person doing an action tells you it must be "man".

Why isn't there a word for "then" before the second verb حصد?

In a simple Arabic conditional sentence where both the condition and the result are in the past tense, a connector word isn't strictly necessary. The structure of placing the two verbs in sequence naturally creates the "if this, then that" meaning.