言听计从

言聽計從
yántīngjìcóng
  1. to see, hear and obey (idiom); to take advice
  2. to take sb at his word

CEDICT

to always follow somebody's advice; to act upon whatever somebody says; to have implicit faith in somebody

Wiktionary

形容深被信任。《三国演义．第八○回》：「臣自出茅庐，得遇大王，相随至今，言听计从。」《官场现形记．第一一回》：「他在刘中丞手下当差，却也非止一日，一向是言听计从，院上这些老爷们，没有一个盖过他的，真正是天字第一号的红人。」也作「言听计行」。

重編國語辭典

指听从某人说的话语、出的计谋，形容某人深受信任

維基詞典

Entry Composition

1 言 yán
  1. words
  2. speech
  3. to say
  4. to talk
2 听 tīng
  1. to listen to; to hear
  2. to heed; to obey
  3. a can (loanword from English "tin")
  4. classifier for canned beverages
  5. to let be; to allow (Taiwan pr. tìng)
  6. (literary) to administer; to deal with (Taiwan pr. tìng)
3 计 jì
  1. to calculate
  2. to compute
  3. to count
  4. to regard as important
  5. to plan
  6. ruse
  7. meter
  8. gauge
=4 从 cóng variant of 从 cóng
=4 从 cóng
  1. from; through; via
  2. (bound form) to follow
  3. (bound form) to obey
  4. (bound form) to engage in (an activity)
  5. (used before a negative) ever
  6. (bound form) (Taiwan pr. zòng) retainer; attendant
  7. (bound form) (Taiwan pr. zòng) assistant; auxiliary; subordinate
  8. (bound form) (Taiwan pr. zòng) related by common paternal grandfather or earlier ancestor