桑梓：（书fml）《诗经·小雅·小牟》：‘维桑与梓，必恭敬止。’是说家乡的桑树和梓树是父母种的，对它要表示敬意。后人用来比喻故乡。

mulberry and catalpa, referring to one's native place. The Book of Songs ·Odes·Happy Jackdaws: ‘The mulberry and catalpa raised by parents/Must be looked up to with great esteem.’