وَلْيَسَعْكَ بَيْتُكَ
“Let your home be sufficient for you.”
The لْ is the lām of command, making a present-tense verb convey an instruction. The suffix كَ in يَسَعْكَ means “you,” while بَيْتُكَ is the subject of the verb: literally, “let your house make room for you.”
وَابْكِ عَلَى خَطِيئَتِكَ
“And weep over your mistake.”
ابْكِ is a direct imperative. Thus one instruction uses lām of command + imperfect verb, while the other uses a direct imperative. Both lead toward self-discipline.